xserver and mesa git update 28-12-2010

1 files changed, 635 insertions, 635 deletions

diff --git a/mesalib/src/mesa/main/texrender.c b/mesalib/src/mesa/main/texrender.c
index c68105b39..6d5531f18 100644
--- a/mesalib/src/mesa/main/texrender.c
+++ b/mesalib/src/mesa/main/texrender.c
@@ -1,635 +1,635 @@
-
-#include "context.h"
-#include "colormac.h"
-#include "macros.h"
-#include "texfetch.h"
-#include "texrender.h"
-#include "renderbuffer.h"
-
-
-/*
- * Render-to-texture code for GL_EXT_framebuffer_object
- */
-
-
-/**
- * Derived from gl_renderbuffer class
- */
-struct texture_renderbuffer
-{
-   struct gl_renderbuffer Base;   /**< Base class object */
-   struct gl_texture_image *TexImage;
-   StoreTexelFunc Store;
-   GLint Yoffset;                 /**< Layer for 1D array textures. */
-   GLint Zoffset;                 /**< Layer for 2D array textures, or slice
-				   * for 3D textures
-				   */
-};
-
-
-/**
- * Get row of values from the renderbuffer that wraps a texture image.
- */
-static void
-texture_get_row(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
-                GLint x, GLint y, void *values)
-{
-   const struct texture_renderbuffer *trb
-      = (const struct texture_renderbuffer *) rb;
-   const GLint z = trb->Zoffset;
-   GLuint i;
-
-   ASSERT(trb->TexImage->Width == rb->Width);
-   ASSERT(trb->TexImage->Height == rb->Height);
-
-   y += trb->Yoffset;
-
-   if (rb->DataType == CHAN_TYPE) {
-      GLchan *rgbaOut = (GLchan *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat rgba[4];
-         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, rgba);
-         UNCLAMPED_FLOAT_TO_RGBA_CHAN(rgbaOut + 4 * i, rgba);
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_SHORT) {
-      GLushort *zValues = (GLushort *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat flt;
-         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, &flt);
-         zValues[i] = (GLushort) (flt * 0xffff);
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT) {
-      GLuint *zValues = (GLuint *) values;
-      /*
-      const GLdouble scale = (GLdouble) 0xffffffff;
-      */
-      for (i = 0; i < count; i++) {
-         GLfloat flt;
-         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, &flt);
-#if 0
-         /* this should work, but doesn't (overflow due to low precision) */
-         zValues[i] = (GLuint) (flt * scale);
-#else
-         /* temporary hack */
-         zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
-#endif
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
-      GLuint *zValues = (GLuint *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat flt;
-         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, &flt);
-         zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
-      GLuint *zValues = (GLuint *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat flt;
-         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, &flt);
-         zValues[i] = (GLuint) (flt * 0xffffff);
-      }
-   }
-   else {
-      _mesa_problem(ctx, "invalid rb->DataType in texture_get_row");
-   }
-}
-
-
-static void
-texture_get_values(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
-                   const GLint x[], const GLint y[], void *values)
-{
-   const struct texture_renderbuffer *trb
-      = (const struct texture_renderbuffer *) rb;
-   const GLint z = trb->Zoffset;
-   GLuint i;
-
-   if (rb->DataType == CHAN_TYPE) {
-      GLchan *rgbaOut = (GLchan *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat rgba[4];
-         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,
-				    z, rgba);
-         UNCLAMPED_FLOAT_TO_RGBA_CHAN(rgbaOut + 4 * i, rgba);
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_SHORT) {
-      GLushort *zValues = (GLushort *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat flt;
-         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,
-				    z, &flt);
-         zValues[i] = (GLushort) (flt * 0xffff);
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT) {
-      GLuint *zValues = (GLuint *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat flt;
-         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,
-				    z, &flt);
-#if 0
-         zValues[i] = (GLuint) (flt * 0xffffffff);
-#else
-         zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
-#endif
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
-      GLuint *zValues = (GLuint *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat flt;
-         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,
-				    z, &flt);
-         zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
-      GLuint *zValues = (GLuint *) values;
-      for (i = 0; i < count; i++) {
-         GLfloat flt;
-         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,
-				    z, &flt);
-         zValues[i] = (GLuint) (flt * 0xffffff);
-      }
-   }
-   else {
-      _mesa_problem(ctx, "invalid rb->DataType in texture_get_values");
-   }
-}
-
-
-/**
- * Put row of values into a renderbuffer that wraps a texture image.
- */
-static void
-texture_put_row(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
-                GLint x, GLint y, const void *values, const GLubyte *mask)
-{
-   const struct texture_renderbuffer *trb
-      = (const struct texture_renderbuffer *) rb;
-   const GLint z = trb->Zoffset;
-   GLuint i;
-
-   y += trb->Yoffset;
-
-   if (rb->DataType == CHAN_TYPE) {
-      const GLchan *rgba = (const GLchan *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, rgba);
-         }
-         rgba += 4;
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_SHORT) {
-      const GLushort *zValues = (const GLushort *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, zValues + i);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, zValues + i);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
-            trb->Store(trb->TexImage, x + i, y, z, &flt);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
-            trb->Store(trb->TexImage, x + i, y, z, &flt);
-         }
-      }
-   }
-   else {
-      _mesa_problem(ctx, "invalid rb->DataType in texture_put_row");
-   }
-}
-
-/**
- * Put row of RGB values into a renderbuffer that wraps a texture image.
- */
-static void
-texture_put_row_rgb(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
-                GLint x, GLint y, const void *values, const GLubyte *mask)
-{
-   const struct texture_renderbuffer *trb
-      = (const struct texture_renderbuffer *) rb;
-   const GLint z = trb->Zoffset;
-   GLuint i;
-
-   y += trb->Yoffset;
-
-   if (rb->DataType == CHAN_TYPE) {
-      const GLchan *rgb = (const GLchan *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, rgb);
-         }
-         rgb += 3;
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_SHORT) {
-      const GLushort *zValues = (const GLushort *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, zValues + i);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, zValues + i);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
-            trb->Store(trb->TexImage, x + i, y, z, &flt);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
-            trb->Store(trb->TexImage, x + i, y, z, &flt);
-         }
-      }
-   }
-   else {
-      _mesa_problem(ctx, "invalid rb->DataType in texture_put_row");
-   }
-}
-
-
-static void
-texture_put_mono_row(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
-                     GLint x, GLint y, const void *value, const GLubyte *mask)
-{
-   const struct texture_renderbuffer *trb
-      = (const struct texture_renderbuffer *) rb;
-   const GLint z = trb->Zoffset;
-   GLuint i;
-
-   y += trb->Yoffset;
-
-   if (rb->DataType == CHAN_TYPE) {
-      const GLchan *rgba = (const GLchan *) value;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, rgba);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_SHORT) {
-      const GLushort zValue = *((const GLushort *) value);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, &zValue);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT) {
-      const GLuint zValue = *((const GLuint *) value);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, &zValue);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
-      const GLuint zValue = *((const GLuint *) value);
-      const GLfloat flt = (GLfloat) ((zValue >> 8) * (1.0 / 0xffffff));
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, &flt);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
-      const GLuint zValue = *((const GLuint *) value);
-      const GLfloat flt = (GLfloat) ((zValue & 0xffffff) * (1.0 / 0xffffff));
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x + i, y, z, &flt);
-         }
-      }
-   }
-   else {
-      _mesa_problem(ctx, "invalid rb->DataType in texture_put_mono_row");
-   }
-}
-
-
-static void
-texture_put_values(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
-                   const GLint x[], const GLint y[], const void *values,
-                   const GLubyte *mask)
-{
-   const struct texture_renderbuffer *trb
-      = (const struct texture_renderbuffer *) rb;
-   const GLint z = trb->Zoffset;
-   GLuint i;
-
-   if (rb->DataType == CHAN_TYPE) {
-      const GLchan *rgba = (const GLchan *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, rgba);
-         }
-         rgba += 4;
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_SHORT) {
-      const GLushort *zValues = (const GLushort *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, zValues + i);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, zValues + i);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
-      const GLuint *zValues = (const GLuint *) values;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
-         }
-      }
-   }
-   else {
-      _mesa_problem(ctx, "invalid rb->DataType in texture_put_values");
-   }
-}
-
-
-static void
-texture_put_mono_values(GLcontext *ctx, struct gl_renderbuffer *rb,
-                        GLuint count, const GLint x[], const GLint y[],
-                        const void *value, const GLubyte *mask)
-{
-   const struct texture_renderbuffer *trb
-      = (const struct texture_renderbuffer *) rb;
-   const GLint z = trb->Zoffset;
-   GLuint i;
-
-   if (rb->DataType == CHAN_TYPE) {
-      const GLchan *rgba = (const GLchan *) value;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, rgba);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT) {
-      const GLuint zValue = *((const GLuint *) value);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &zValue);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_SHORT) {
-      const GLushort zValue = *((const GLushort *) value);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &zValue);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
-      const GLuint zValue = *((const GLuint *) value);
-      const GLfloat flt = (GLfloat) ((zValue >> 8) * (1.0 / 0xffffff));
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
-         }
-      }
-   }
-   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
-      const GLuint zValue = *((const GLuint *) value);
-      const GLfloat flt = (GLfloat) ((zValue & 0xffffff) * (1.0 / 0xffffff));
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
-         }
-      }
-   }
-   else {
-      _mesa_problem(ctx, "invalid rb->DataType in texture_put_mono_values");
-   }
-}
-
-
-static void
-store_nop(struct gl_texture_image *texImage,
-          GLint col, GLint row, GLint img,
-          const void *texel)
-{
-}
-
-
-static void
-delete_texture_wrapper(struct gl_renderbuffer *rb)
-{
-   ASSERT(rb->RefCount == 0);
-   free(rb);
-}
-
-
-/**
- * This function creates a renderbuffer object which wraps a texture image.
- * The new renderbuffer is plugged into the given attachment point.
- * This allows rendering into the texture as if it were a renderbuffer.
- */
-static void
-wrap_texture(GLcontext *ctx, struct gl_renderbuffer_attachment *att)
-{
-   struct texture_renderbuffer *trb;
-   const GLuint name = 0;
-
-   ASSERT(att->Type == GL_TEXTURE);
-   ASSERT(att->Renderbuffer == NULL);
-
-   trb = CALLOC_STRUCT(texture_renderbuffer);
-   if (!trb) {
-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "wrap_texture");
-      return;
-   }
-
-   /* init base gl_renderbuffer fields */
-   _mesa_init_renderbuffer(&trb->Base, name);
-   /* plug in our texture_renderbuffer-specific functions */
-   trb->Base.Delete = delete_texture_wrapper;
-   trb->Base.AllocStorage = NULL; /* illegal! */
-   trb->Base.GetRow = texture_get_row;
-   trb->Base.GetValues = texture_get_values;
-   trb->Base.PutRow = texture_put_row;
-   trb->Base.PutRowRGB = texture_put_row_rgb;
-   trb->Base.PutMonoRow = texture_put_mono_row;
-   trb->Base.PutValues = texture_put_values;
-   trb->Base.PutMonoValues = texture_put_mono_values;
-
-   /* update attachment point */
-   _mesa_reference_renderbuffer(&att->Renderbuffer, &(trb->Base));
-}
-
-
-
-/**
- * Update the renderbuffer wrapper for rendering to a texture.
- * For example, update the width, height of the RB based on the texture size,
- * update the internal format info, etc.
- */
-static void
-update_wrapper(GLcontext *ctx, const struct gl_renderbuffer_attachment *att)
-{
-   struct texture_renderbuffer *trb
-      = (struct texture_renderbuffer *) att->Renderbuffer;
-
-   (void) ctx;
-   ASSERT(trb);
-
-   trb->TexImage = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
-   ASSERT(trb->TexImage);
-
-   trb->Store = _mesa_get_texel_store_func(trb->TexImage->TexFormat);
-   if (!trb->Store) {
-      /* we'll never draw into some textures (compressed formats) */
-      trb->Store = store_nop;
-   }
-
-   if (att->Texture->Target == GL_TEXTURE_1D_ARRAY_EXT) {
-      trb->Yoffset = att->Zoffset;
-      trb->Zoffset = 0;
-   }
-   else {
-      trb->Yoffset = 0;
-      trb->Zoffset = att->Zoffset;
-   }
-
-   trb->Base.Width = trb->TexImage->Width;
-   trb->Base.Height = trb->TexImage->Height;
-   trb->Base.InternalFormat = trb->TexImage->InternalFormat;
-   trb->Base.Format = trb->TexImage->TexFormat;
-
-   /* XXX may need more special cases here */
-   switch (trb->TexImage->TexFormat) {
-   case MESA_FORMAT_Z24_S8:
-      trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
-      trb->Base._BaseFormat = GL_DEPTH_STENCIL;
-      break;
-   case MESA_FORMAT_S8_Z24:
-      trb->Base.DataType = GL_UNSIGNED_INT_8_24_REV_MESA;
-      trb->Base._BaseFormat = GL_DEPTH_STENCIL;
-      break;
-   case MESA_FORMAT_Z24_X8:
-      trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
-      trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
-      break;
-   case MESA_FORMAT_X8_Z24:
-      trb->Base.DataType = GL_UNSIGNED_INT_8_24_REV_MESA;
-      trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
-      break;
-   case MESA_FORMAT_Z16:
-      trb->Base.DataType = GL_UNSIGNED_SHORT;
-      trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
-      break;
-   case MESA_FORMAT_Z32:
-      trb->Base.DataType = GL_UNSIGNED_INT;
-      trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
-      break;
-   default:
-      trb->Base.DataType = CHAN_TYPE;
-      trb->Base._BaseFormat = GL_RGBA;
-   }
-   trb->Base.Data = trb->TexImage->Data;
-}
-
-
-
-/**
- * Called when rendering to a texture image begins, or when changing
- * the dest mipmap level, cube face, etc.
- * This is a fallback routine for software render-to-texture.
- *
- * Called via the glRenderbufferTexture1D/2D/3D() functions
- * and elsewhere (such as glTexImage2D).
- *
- * The image we're rendering into is
- * att->Texture->Image[att->CubeMapFace][att->TextureLevel];
- * It'll never be NULL.
- *
- * \param fb  the framebuffer object the texture is being bound to
- * \param att  the fb attachment point of the texture
- *
- * \sa _mesa_framebuffer_renderbuffer
- */
-void
-_mesa_render_texture(GLcontext *ctx,
-                     struct gl_framebuffer *fb,
-                     struct gl_renderbuffer_attachment *att)
-{
-   (void) fb;
-
-   if (!att->Renderbuffer) {
-      wrap_texture(ctx, att);
-   }
-   update_wrapper(ctx, att);
-}
-
-
-void
-_mesa_finish_render_texture(GLcontext *ctx,
-                            struct gl_renderbuffer_attachment *att)
-{
-   /* do nothing */
-   /* The renderbuffer texture wrapper will get deleted by the
-    * normal mechanism for deleting renderbuffers.
-    */
-   (void) ctx;
-   (void) att;
-}
+

+#include "context.h"

+#include "colormac.h"

+#include "macros.h"

+#include "texfetch.h"

+#include "texrender.h"

+#include "renderbuffer.h"

+

+

+/*

+ * Render-to-texture code for GL_EXT_framebuffer_object

+ */

+

+

+/**

+ * Derived from gl_renderbuffer class

+ */

+struct texture_renderbuffer

+{

+   struct gl_renderbuffer Base;   /**< Base class object */

+   struct gl_texture_image *TexImage;

+   StoreTexelFunc Store;

+   GLint Yoffset;                 /**< Layer for 1D array textures. */

+   GLint Zoffset;                 /**< Layer for 2D array textures, or slice

+				   * for 3D textures

+				   */

+};

+

+

+/**

+ * Get row of values from the renderbuffer that wraps a texture image.

+ */

+static void

+texture_get_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,

+                GLint x, GLint y, void *values)

+{

+   const struct texture_renderbuffer *trb

+      = (const struct texture_renderbuffer *) rb;

+   const GLint z = trb->Zoffset;

+   GLuint i;

+

+   ASSERT(trb->TexImage->Width == rb->Width);

+   ASSERT(trb->TexImage->Height == rb->Height);

+

+   y += trb->Yoffset;

+

+   if (rb->DataType == CHAN_TYPE) {

+      GLchan *rgbaOut = (GLchan *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat rgba[4];

+         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, rgba);

+         UNCLAMPED_FLOAT_TO_RGBA_CHAN(rgbaOut + 4 * i, rgba);

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_SHORT) {

+      GLushort *zValues = (GLushort *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat flt;

+         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, &flt);

+         zValues[i] = (GLushort) (flt * 0xffff);

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT) {

+      GLuint *zValues = (GLuint *) values;

+      /*

+      const GLdouble scale = (GLdouble) 0xffffffff;

+      */

+      for (i = 0; i < count; i++) {

+         GLfloat flt;

+         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, &flt);

+#if 0

+         /* this should work, but doesn't (overflow due to low precision) */

+         zValues[i] = (GLuint) (flt * scale);

+#else

+         /* temporary hack */

+         zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;

+#endif

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {

+      GLuint *zValues = (GLuint *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat flt;

+         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, &flt);

+         zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {

+      GLuint *zValues = (GLuint *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat flt;

+         trb->TexImage->FetchTexelf(trb->TexImage, x + i, y, z, &flt);

+         zValues[i] = (GLuint) (flt * 0xffffff);

+      }

+   }

+   else {

+      _mesa_problem(ctx, "invalid rb->DataType in texture_get_row");

+   }

+}

+

+

+static void

+texture_get_values(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,

+                   const GLint x[], const GLint y[], void *values)

+{

+   const struct texture_renderbuffer *trb

+      = (const struct texture_renderbuffer *) rb;

+   const GLint z = trb->Zoffset;

+   GLuint i;

+

+   if (rb->DataType == CHAN_TYPE) {

+      GLchan *rgbaOut = (GLchan *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat rgba[4];

+         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,

+				    z, rgba);

+         UNCLAMPED_FLOAT_TO_RGBA_CHAN(rgbaOut + 4 * i, rgba);

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_SHORT) {

+      GLushort *zValues = (GLushort *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat flt;

+         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,

+				    z, &flt);

+         zValues[i] = (GLushort) (flt * 0xffff);

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT) {

+      GLuint *zValues = (GLuint *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat flt;

+         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,

+				    z, &flt);

+#if 0

+         zValues[i] = (GLuint) (flt * 0xffffffff);

+#else

+         zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;

+#endif

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {

+      GLuint *zValues = (GLuint *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat flt;

+         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,

+				    z, &flt);

+         zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {

+      GLuint *zValues = (GLuint *) values;

+      for (i = 0; i < count; i++) {

+         GLfloat flt;

+         trb->TexImage->FetchTexelf(trb->TexImage, x[i], y[i] + trb->Yoffset,

+				    z, &flt);

+         zValues[i] = (GLuint) (flt * 0xffffff);

+      }

+   }

+   else {

+      _mesa_problem(ctx, "invalid rb->DataType in texture_get_values");

+   }

+}

+

+

+/**

+ * Put row of values into a renderbuffer that wraps a texture image.

+ */

+static void

+texture_put_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,

+                GLint x, GLint y, const void *values, const GLubyte *mask)

+{

+   const struct texture_renderbuffer *trb

+      = (const struct texture_renderbuffer *) rb;

+   const GLint z = trb->Zoffset;

+   GLuint i;

+

+   y += trb->Yoffset;

+

+   if (rb->DataType == CHAN_TYPE) {

+      const GLchan *rgba = (const GLchan *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, rgba);

+         }

+         rgba += 4;

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_SHORT) {

+      const GLushort *zValues = (const GLushort *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, zValues + i);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, zValues + i);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));

+            trb->Store(trb->TexImage, x + i, y, z, &flt);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));

+            trb->Store(trb->TexImage, x + i, y, z, &flt);

+         }

+      }

+   }

+   else {

+      _mesa_problem(ctx, "invalid rb->DataType in texture_put_row");

+   }

+}

+

+/**

+ * Put row of RGB values into a renderbuffer that wraps a texture image.

+ */

+static void

+texture_put_row_rgb(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,

+                GLint x, GLint y, const void *values, const GLubyte *mask)

+{

+   const struct texture_renderbuffer *trb

+      = (const struct texture_renderbuffer *) rb;

+   const GLint z = trb->Zoffset;

+   GLuint i;

+

+   y += trb->Yoffset;

+

+   if (rb->DataType == CHAN_TYPE) {

+      const GLchan *rgb = (const GLchan *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, rgb);

+         }

+         rgb += 3;

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_SHORT) {

+      const GLushort *zValues = (const GLushort *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, zValues + i);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, zValues + i);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));

+            trb->Store(trb->TexImage, x + i, y, z, &flt);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));

+            trb->Store(trb->TexImage, x + i, y, z, &flt);

+         }

+      }

+   }

+   else {

+      _mesa_problem(ctx, "invalid rb->DataType in texture_put_row");

+   }

+}

+

+

+static void

+texture_put_mono_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,

+                     GLint x, GLint y, const void *value, const GLubyte *mask)

+{

+   const struct texture_renderbuffer *trb

+      = (const struct texture_renderbuffer *) rb;

+   const GLint z = trb->Zoffset;

+   GLuint i;

+

+   y += trb->Yoffset;

+

+   if (rb->DataType == CHAN_TYPE) {

+      const GLchan *rgba = (const GLchan *) value;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, rgba);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_SHORT) {

+      const GLushort zValue = *((const GLushort *) value);

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, &zValue);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT) {

+      const GLuint zValue = *((const GLuint *) value);

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, &zValue);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {

+      const GLuint zValue = *((const GLuint *) value);

+      const GLfloat flt = (GLfloat) ((zValue >> 8) * (1.0 / 0xffffff));

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, &flt);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {

+      const GLuint zValue = *((const GLuint *) value);

+      const GLfloat flt = (GLfloat) ((zValue & 0xffffff) * (1.0 / 0xffffff));

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x + i, y, z, &flt);

+         }

+      }

+   }

+   else {

+      _mesa_problem(ctx, "invalid rb->DataType in texture_put_mono_row");

+   }

+}

+

+

+static void

+texture_put_values(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,

+                   const GLint x[], const GLint y[], const void *values,

+                   const GLubyte *mask)

+{

+   const struct texture_renderbuffer *trb

+      = (const struct texture_renderbuffer *) rb;

+   const GLint z = trb->Zoffset;

+   GLuint i;

+

+   if (rb->DataType == CHAN_TYPE) {

+      const GLchan *rgba = (const GLchan *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, rgba);

+         }

+         rgba += 4;

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_SHORT) {

+      const GLushort *zValues = (const GLushort *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, zValues + i);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, zValues + i);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {

+      const GLuint *zValues = (const GLuint *) values;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);

+         }

+      }

+   }

+   else {

+      _mesa_problem(ctx, "invalid rb->DataType in texture_put_values");

+   }

+}

+

+

+static void

+texture_put_mono_values(struct gl_context *ctx, struct gl_renderbuffer *rb,

+                        GLuint count, const GLint x[], const GLint y[],

+                        const void *value, const GLubyte *mask)

+{

+   const struct texture_renderbuffer *trb

+      = (const struct texture_renderbuffer *) rb;

+   const GLint z = trb->Zoffset;

+   GLuint i;

+

+   if (rb->DataType == CHAN_TYPE) {

+      const GLchan *rgba = (const GLchan *) value;

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, rgba);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT) {

+      const GLuint zValue = *((const GLuint *) value);

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &zValue);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_SHORT) {

+      const GLushort zValue = *((const GLushort *) value);

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &zValue);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {

+      const GLuint zValue = *((const GLuint *) value);

+      const GLfloat flt = (GLfloat) ((zValue >> 8) * (1.0 / 0xffffff));

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);

+         }

+      }

+   }

+   else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {

+      const GLuint zValue = *((const GLuint *) value);

+      const GLfloat flt = (GLfloat) ((zValue & 0xffffff) * (1.0 / 0xffffff));

+      for (i = 0; i < count; i++) {

+         if (!mask || mask[i]) {

+            trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);

+         }

+      }

+   }

+   else {

+      _mesa_problem(ctx, "invalid rb->DataType in texture_put_mono_values");

+   }

+}

+

+

+static void

+store_nop(struct gl_texture_image *texImage,

+          GLint col, GLint row, GLint img,

+          const void *texel)

+{

+}

+

+

+static void

+delete_texture_wrapper(struct gl_renderbuffer *rb)

+{

+   ASSERT(rb->RefCount == 0);

+   free(rb);

+}

+

+

+/**

+ * This function creates a renderbuffer object which wraps a texture image.

+ * The new renderbuffer is plugged into the given attachment point.

+ * This allows rendering into the texture as if it were a renderbuffer.

+ */

+static void

+wrap_texture(struct gl_context *ctx, struct gl_renderbuffer_attachment *att)

+{

+   struct texture_renderbuffer *trb;

+   const GLuint name = 0;

+

+   ASSERT(att->Type == GL_TEXTURE);

+   ASSERT(att->Renderbuffer == NULL);

+

+   trb = CALLOC_STRUCT(texture_renderbuffer);

+   if (!trb) {

+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "wrap_texture");

+      return;

+   }

+

+   /* init base gl_renderbuffer fields */

+   _mesa_init_renderbuffer(&trb->Base, name);

+   /* plug in our texture_renderbuffer-specific functions */

+   trb->Base.Delete = delete_texture_wrapper;

+   trb->Base.AllocStorage = NULL; /* illegal! */

+   trb->Base.GetRow = texture_get_row;

+   trb->Base.GetValues = texture_get_values;

+   trb->Base.PutRow = texture_put_row;

+   trb->Base.PutRowRGB = texture_put_row_rgb;

+   trb->Base.PutMonoRow = texture_put_mono_row;

+   trb->Base.PutValues = texture_put_values;

+   trb->Base.PutMonoValues = texture_put_mono_values;

+

+   /* update attachment point */

+   _mesa_reference_renderbuffer(&att->Renderbuffer, &(trb->Base));

+}

+

+

+

+/**

+ * Update the renderbuffer wrapper for rendering to a texture.

+ * For example, update the width, height of the RB based on the texture size,

+ * update the internal format info, etc.

+ */

+static void

+update_wrapper(struct gl_context *ctx, const struct gl_renderbuffer_attachment *att)

+{

+   struct texture_renderbuffer *trb

+      = (struct texture_renderbuffer *) att->Renderbuffer;

+

+   (void) ctx;

+   ASSERT(trb);

+

+   trb->TexImage = att->Texture->Image[att->CubeMapFace][att->TextureLevel];

+   ASSERT(trb->TexImage);

+

+   trb->Store = _mesa_get_texel_store_func(trb->TexImage->TexFormat);

+   if (!trb->Store) {

+      /* we'll never draw into some textures (compressed formats) */

+      trb->Store = store_nop;

+   }

+

+   if (att->Texture->Target == GL_TEXTURE_1D_ARRAY_EXT) {

+      trb->Yoffset = att->Zoffset;

+      trb->Zoffset = 0;

+   }

+   else {

+      trb->Yoffset = 0;

+      trb->Zoffset = att->Zoffset;

+   }

+

+   trb->Base.Width = trb->TexImage->Width;

+   trb->Base.Height = trb->TexImage->Height;

+   trb->Base.InternalFormat = trb->TexImage->InternalFormat;

+   trb->Base.Format = trb->TexImage->TexFormat;

+

+   /* XXX may need more special cases here */

+   switch (trb->TexImage->TexFormat) {

+   case MESA_FORMAT_Z24_S8:

+      trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;

+      trb->Base._BaseFormat = GL_DEPTH_STENCIL;

+      break;

+   case MESA_FORMAT_S8_Z24:

+      trb->Base.DataType = GL_UNSIGNED_INT_8_24_REV_MESA;

+      trb->Base._BaseFormat = GL_DEPTH_STENCIL;

+      break;

+   case MESA_FORMAT_Z24_X8:

+      trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;

+      trb->Base._BaseFormat = GL_DEPTH_COMPONENT;

+      break;

+   case MESA_FORMAT_X8_Z24:

+      trb->Base.DataType = GL_UNSIGNED_INT_8_24_REV_MESA;

+      trb->Base._BaseFormat = GL_DEPTH_COMPONENT;

+      break;

+   case MESA_FORMAT_Z16:

+      trb->Base.DataType = GL_UNSIGNED_SHORT;

+      trb->Base._BaseFormat = GL_DEPTH_COMPONENT;

+      break;

+   case MESA_FORMAT_Z32:

+      trb->Base.DataType = GL_UNSIGNED_INT;

+      trb->Base._BaseFormat = GL_DEPTH_COMPONENT;

+      break;

+   default:

+      trb->Base.DataType = CHAN_TYPE;

+      trb->Base._BaseFormat = GL_RGBA;

+   }

+   trb->Base.Data = trb->TexImage->Data;

+}

+

+

+

+/**

+ * Called when rendering to a texture image begins, or when changing

+ * the dest mipmap level, cube face, etc.

+ * This is a fallback routine for software render-to-texture.

+ *

+ * Called via the glRenderbufferTexture1D/2D/3D() functions

+ * and elsewhere (such as glTexImage2D).

+ *

+ * The image we're rendering into is

+ * att->Texture->Image[att->CubeMapFace][att->TextureLevel];

+ * It'll never be NULL.

+ *

+ * \param fb  the framebuffer object the texture is being bound to

+ * \param att  the fb attachment point of the texture

+ *

+ * \sa _mesa_framebuffer_renderbuffer

+ */

+void

+_mesa_render_texture(struct gl_context *ctx,

+                     struct gl_framebuffer *fb,

+                     struct gl_renderbuffer_attachment *att)

+{

+   (void) fb;

+

+   if (!att->Renderbuffer) {

+      wrap_texture(ctx, att);

+   }

+   update_wrapper(ctx, att);

+}

+

+

+void

+_mesa_finish_render_texture(struct gl_context *ctx,

+                            struct gl_renderbuffer_attachment *att)

+{

+   /* do nothing */

+   /* The renderbuffer texture wrapper will get deleted by the

+    * normal mechanism for deleting renderbuffers.

+    */

+   (void) ctx;

+   (void) att;

+}