diff options
Diffstat (limited to 'mesalib/src/mesa/main/texrender.c')
| -rw-r--r-- | mesalib/src/mesa/main/texrender.c | 567 |
1 files changed, 567 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/texrender.c b/mesalib/src/mesa/main/texrender.c new file mode 100644 index 000000000..53be83b05 --- /dev/null +++ b/mesalib/src/mesa/main/texrender.c @@ -0,0 +1,567 @@ + +#include "context.h" +#include "fbobject.h" +#include "texformat.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++) { + trb->TexImage->FetchTexelc(trb->TexImage, x + i, y, z, rgbaOut + 4 * i); + } + } + 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 { + _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++) { + trb->TexImage->FetchTexelc(trb->TexImage, x[i], y[i] + trb->Yoffset, + z, rgbaOut + 4 * i); + } + } + 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 { + _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 { + _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 { + _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 { + _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 { + _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 { + _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); + _mesa_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 = trb->TexImage->TexFormat->StoreTexel; + 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; + /* XXX may need more special cases here */ + if (trb->TexImage->TexFormat->MesaFormat == MESA_FORMAT_Z24_S8) { + trb->Base._ActualFormat = GL_DEPTH24_STENCIL8_EXT; + trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT; + } + else if (trb->TexImage->TexFormat->MesaFormat == MESA_FORMAT_Z16) { + trb->Base._ActualFormat = GL_DEPTH_COMPONENT; + trb->Base.DataType = GL_UNSIGNED_SHORT; + } + else if (trb->TexImage->TexFormat->MesaFormat == MESA_FORMAT_Z32) { + trb->Base._ActualFormat = GL_DEPTH_COMPONENT; + trb->Base.DataType = GL_UNSIGNED_INT; + } + else { + trb->Base._ActualFormat = trb->TexImage->InternalFormat; + trb->Base.DataType = CHAN_TYPE; + } + trb->Base._BaseFormat = trb->TexImage->TexFormat->BaseFormat; +#if 0 + /* fix/avoid this assertion someday */ + ASSERT(trb->Base._BaseFormat == GL_RGB || + trb->Base._BaseFormat == GL_RGBA || + trb->Base._BaseFormat == GL_DEPTH_COMPONENT); +#endif + trb->Base.Data = trb->TexImage->Data; + + trb->Base.RedBits = trb->TexImage->TexFormat->RedBits; + trb->Base.GreenBits = trb->TexImage->TexFormat->GreenBits; + trb->Base.BlueBits = trb->TexImage->TexFormat->BlueBits; + trb->Base.AlphaBits = trb->TexImage->TexFormat->AlphaBits; + trb->Base.DepthBits = trb->TexImage->TexFormat->DepthBits; + trb->Base.StencilBits = trb->TexImage->TexFormat->StencilBits; +} + + + +/** + * 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; +} |