Added MesaLib-7.6

1 files changed, 217 insertions, 0 deletions

diff --git a/mesalib/src/mesa/drivers/dri/common/drirenderbuffer.c b/mesalib/src/mesa/drivers/dri/common/drirenderbuffer.c
new file mode 100644
index 000000000..15af99136
--- /dev/null
+++ b/mesalib/src/mesa/drivers/dri/common/drirenderbuffer.c
@@ -0,0 +1,217 @@
+
+#include "main/mtypes.h"
+#include "main/framebuffer.h"
+#include "main/renderbuffer.h"
+#include "main/imports.h"
+#include "drirenderbuffer.h"
+
+
+/**
+ * This will get called when a window (gl_framebuffer) is resized (probably
+ * via driUpdateFramebufferSize(), below).
+ * Just update width, height and internal format fields for now.
+ * There's usually no memory allocation above because the present
+ * DRI drivers use statically-allocated full-screen buffers. If that's not
+ * the case for a DRI driver, a different AllocStorage method should
+ * be used.
+ */
+static GLboolean
+driRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb,
+                       GLenum internalFormat, GLuint width, GLuint height)
+{
+   rb->Width = width;
+   rb->Height = height;
+   rb->InternalFormat = internalFormat;
+   return GL_TRUE;
+}
+
+
+static void
+driDeleteRenderbuffer(struct gl_renderbuffer *rb)
+{
+   /* don't free rb->Data  Chances are it's a memory mapped region for
+    * the dri drivers.
+    */
+   _mesa_free(rb);
+}
+
+
+/**
+ * Allocate a new driRenderbuffer object.
+ * Individual drivers are free to implement different versions of
+ * this function.
+ *
+ * At this time, this function can only be used for window-system
+ * renderbuffers, not user-created RBOs.
+ *
+ * \param format  Either GL_RGBA, GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24,
+ *                GL_DEPTH_COMPONENT32, or GL_STENCIL_INDEX8_EXT (for now).
+ * \param addr  address in main memory of the buffer.  Probably a memory
+ *              mapped region.
+ * \param cpp  chars or bytes per pixel
+ * \param offset  start of renderbuffer with respect to start of framebuffer
+ * \param pitch   pixels per row
+ */
+driRenderbuffer *
+driNewRenderbuffer(GLenum format, GLvoid *addr,
+                   GLint cpp, GLint offset, GLint pitch,
+                   __DRIdrawablePrivate *dPriv)
+{
+   driRenderbuffer *drb;
+
+   assert(format == GL_RGBA ||
+          format == GL_RGB5 ||
+          format == GL_RGBA8 ||
+          format == GL_DEPTH_COMPONENT16 ||
+          format == GL_DEPTH_COMPONENT24 ||
+          format == GL_DEPTH_COMPONENT32 ||
+          format == GL_STENCIL_INDEX8_EXT);
+
+   assert(cpp > 0);
+   assert(pitch > 0);
+
+   drb = _mesa_calloc(sizeof(driRenderbuffer));
+   if (drb) {
+      const GLuint name = 0;
+
+      _mesa_init_renderbuffer(&drb->Base, name);
+
+      /* Make sure we're using a null-valued GetPointer routine */
+      assert(drb->Base.GetPointer(NULL, &drb->Base, 0, 0) == NULL);
+
+      drb->Base.InternalFormat = format;
+
+      if (format == GL_RGBA || format == GL_RGB5 || format == GL_RGBA8) {
+         /* Color */
+         drb->Base._BaseFormat = GL_RGBA;
+         drb->Base.DataType = GL_UNSIGNED_BYTE;
+         if (format == GL_RGB5) {
+            drb->Base.RedBits = 5;
+            drb->Base.GreenBits = 6;
+            drb->Base.BlueBits = 5;
+         }
+         else {
+            drb->Base.RedBits =
+            drb->Base.GreenBits =
+            drb->Base.BlueBits =
+            drb->Base.AlphaBits = 8;
+         }
+      }
+      else if (format == GL_DEPTH_COMPONENT16) {
+         /* Depth */
+         drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+         /* we always Get/Put 32-bit Z values */
+         drb->Base.DataType = GL_UNSIGNED_INT;
+         drb->Base.DepthBits = 16;
+      }
+      else if (format == GL_DEPTH_COMPONENT24) {
+         /* Depth */
+         drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+         /* we always Get/Put 32-bit Z values */
+         drb->Base.DataType = GL_UNSIGNED_INT;
+         drb->Base.DepthBits = 24;
+      }
+      else if (format == GL_DEPTH_COMPONENT32) {
+         /* Depth */
+         drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+         /* we always Get/Put 32-bit Z values */
+         drb->Base.DataType = GL_UNSIGNED_INT;
+         drb->Base.DepthBits = 32;
+      }
+      else {
+         /* Stencil */
+         ASSERT(format == GL_STENCIL_INDEX8_EXT);
+         drb->Base._BaseFormat = GL_STENCIL_INDEX;
+         drb->Base.DataType = GL_UNSIGNED_BYTE;
+         drb->Base.StencilBits = 8;
+      }
+
+      /* XXX if we were allocating a user-created renderbuffer, we'd have
+       * to fill in the Red/Green/Blue/.../Bits values too.
+       */
+
+      drb->Base.AllocStorage = driRenderbufferStorage;
+      drb->Base.Delete = driDeleteRenderbuffer;
+
+      drb->Base.Data = addr;
+
+      /* DRI renderbuffer-specific fields: */
+      drb->dPriv = dPriv;
+      drb->offset = offset;
+      drb->pitch = pitch;
+      drb->cpp = cpp;
+
+      /* may be changed if page flipping is active: */
+      drb->flippedOffset = offset;
+      drb->flippedPitch = pitch;
+      drb->flippedData = addr;
+   }
+   return drb;
+}
+
+
+/**
+ * Update the front and back renderbuffers' flippedPitch/Offset/Data fields.
+ * If stereo, flip both the left and right pairs.
+ * This is used when we do double buffering via page flipping.
+ * \param fb  the framebuffer we're page flipping
+ * \param flipped  if true, set flipped values, else set non-flipped values
+ */
+void
+driFlipRenderbuffers(struct gl_framebuffer *fb, GLboolean flipped)
+{
+   const GLuint count = fb->Visual.stereoMode ? 2 : 1;
+   GLuint lr; /* left or right */
+
+   /* we shouldn't really call this function if single-buffered, but
+    * play it safe.
+    */
+   if (!fb->Visual.doubleBufferMode)
+      return;
+
+   for (lr = 0; lr < count; lr++) {
+      GLuint frontBuf = (lr == 0) ? BUFFER_FRONT_LEFT : BUFFER_FRONT_RIGHT;
+      GLuint backBuf  = (lr == 0) ? BUFFER_BACK_LEFT  : BUFFER_BACK_RIGHT;
+      driRenderbuffer *front_drb
+         = (driRenderbuffer *) fb->Attachment[frontBuf].Renderbuffer;
+      driRenderbuffer *back_drb
+         = (driRenderbuffer *) fb->Attachment[backBuf].Renderbuffer;
+
+      if (flipped) {
+         front_drb->flippedOffset = back_drb->offset;
+         front_drb->flippedPitch  = back_drb->pitch;
+         front_drb->flippedData   = back_drb->Base.Data;
+         back_drb->flippedOffset  = front_drb->offset;
+         back_drb->flippedPitch   = front_drb->pitch;
+         back_drb->flippedData    = front_drb->Base.Data;
+      }
+      else {
+         front_drb->flippedOffset = front_drb->offset;
+         front_drb->flippedPitch  = front_drb->pitch;
+         front_drb->flippedData   = front_drb->Base.Data;
+         back_drb->flippedOffset  = back_drb->offset;
+         back_drb->flippedPitch   = back_drb->pitch;
+         back_drb->flippedData    = back_drb->Base.Data;
+      }
+   }
+}
+
+
+/**
+ * Check that the gl_framebuffer associated with dPriv is the right size.
+ * Resize the gl_framebuffer if needed.
+ * It's expected that the dPriv->driverPrivate member points to a
+ * gl_framebuffer object.
+ */
+void
+driUpdateFramebufferSize(GLcontext *ctx, const __DRIdrawablePrivate *dPriv)
+{
+   struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
+   if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
+      ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
+      /* if the driver needs the hw lock for ResizeBuffers, the drawable
+         might have changed again by now */
+      assert(fb->Width == dPriv->w);
+      assert(fb->Height == dPriv->h);
+   }
+}