1 files changed, 143 insertions, 8 deletions

diff --git a/src/mesa/swrast/s_texture.c b/src/mesa/swrast/s_texture.c
index df371c30e3c..80c3070c941 100644
--- a/src/mesa/swrast/s_texture.c
+++ b/src/mesa/swrast/s_texture.c
@@ -76,9 +76,9 @@ _swrast_alloc_texture_image_buffer(struct gl_context *ctx,
    assert(texImage->Height == height);
    assert(texImage->Depth == depth);
 
-   assert(!swImg->Data);
-   swImg->Data = _mesa_align_malloc(bytes, 512);
-   if (!swImg->Data)
+   assert(!swImg->Buffer);
+   swImg->Buffer = _mesa_align_malloc(bytes, 512);
+   if (!swImg->Buffer)
       return GL_FALSE;
 
    /* RowStride and ImageOffsets[] describe how to address texels in 'Data' */
@@ -128,9 +128,9 @@ _swrast_free_texture_image_buffer(struct gl_context *ctx,
                                   struct gl_texture_image *texImage)
 {
    struct swrast_texture_image *swImage = swrast_texture_image(texImage);
-   if (swImage->Data) {
-      _mesa_align_free(swImage->Data);
-      swImage->Data = NULL;
+   if (swImage->Buffer) {
+      _mesa_align_free(swImage->Buffer);
+      swImage->Buffer = NULL;
    }
 
    if (swImage->ImageOffsets) {
@@ -189,9 +189,9 @@ _swrast_map_teximage(struct gl_context *ctx,
    stride = _mesa_format_row_stride(texImage->TexFormat, texImage->Width);
    _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
 
-   assert(swImage->Data);
+   assert(swImage->Buffer);
 
-   map = swImage->Data;
+   map = swImage->Buffer;
 
    if (texImage->TexObject->Target == GL_TEXTURE_3D ||
        texImage->TexObject->Target == GL_TEXTURE_2D_ARRAY) {
@@ -224,3 +224,138 @@ _swrast_unmap_teximage(struct gl_context *ctx,
 {
    /* nop */
 }
+
+
+void
+_swrast_map_texture(struct gl_context *ctx, struct gl_texture_object *texObj)
+{
+   const GLuint faces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
+   GLuint face, level;
+
+   for (face = 0; face < faces; face++) {
+      for (level = texObj->BaseLevel; level < MAX_TEXTURE_LEVELS; level++) {
+         struct gl_texture_image *texImage = texObj->Image[face][level];
+         if (texImage) {
+            struct swrast_texture_image *swImage =
+               swrast_texture_image(texImage);
+
+            /* XXX we'll eventually call _swrast_map_teximage() here */
+            swImage->Data = swImage->Buffer;
+            assert(swImage->Buffer);
+         }
+      }
+   }
+}
+
+
+void
+_swrast_unmap_texture(struct gl_context *ctx, struct gl_texture_object *texObj)
+{
+   const GLuint faces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
+   GLuint face, level;
+
+   for (face = 0; face < faces; face++) {
+      for (level = texObj->BaseLevel; level < MAX_TEXTURE_LEVELS; level++) {
+         struct gl_texture_image *texImage = texObj->Image[face][level];
+         if (texImage) {
+            struct swrast_texture_image *swImage
+               = swrast_texture_image(texImage);
+
+            /* XXX we'll eventually call _swrast_unmap_teximage() here */
+            swImage->Data = NULL;
+         }
+      }
+   }
+}
+
+
+/**
+ * Map all textures for reading prior to software rendering.
+ */
+void
+_swrast_map_textures(struct gl_context *ctx)
+{
+   GLbitfield enabledUnits = ctx->Texture._EnabledUnits;
+
+   /* loop over enabled texture units */
+   while (enabledUnits) {
+      GLuint unit = ffs(enabledUnits) - 1;
+      struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
+      
+      _swrast_map_texture(ctx, texObj);
+
+      enabledUnits &= ~(1 << unit);
+   }
+}
+
+
+/**
+ * Unmap all textures for reading prior to software rendering.
+ */
+void
+_swrast_unmap_textures(struct gl_context *ctx)
+{
+   GLbitfield enabledUnits = ctx->Texture._EnabledUnits;
+
+   /* loop over enabled texture units */
+   while (enabledUnits) {
+      GLuint unit = ffs(enabledUnits) - 1;
+      struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
+      
+      _swrast_unmap_texture(ctx, texObj);
+
+      enabledUnits &= ~(1 << unit);
+   }
+}
+
+
+/**
+ * Map or unmap any textures that we may be rendering to as renderbuffers.
+ */
+static void
+map_unmap_renderbuffers(struct gl_context *ctx,
+                        struct gl_framebuffer *fb,
+                        GLboolean map)
+{
+   GLuint i;
+
+   for (i = 0; i < Elements(fb->Attachment); i++) {
+      struct gl_texture_object *texObj = fb->Attachment[i].Texture;
+      if (texObj) {
+         const GLuint level = fb->Attachment[i].TextureLevel;
+         const GLuint face = fb->Attachment[i].CubeMapFace;
+         struct gl_texture_image *texImage = texObj->Image[face][level];
+         if (texImage) {
+            struct swrast_texture_image *swImage
+               = swrast_texture_image(texImage);
+
+            if (map) {
+               /* XXX we'll eventually call _swrast_map_teximage() here */
+               swImage->Data = swImage->Buffer;
+            }
+            else {
+               /* XXX we'll eventually call _swrast_unmap_teximage() here */
+               swImage->Data = NULL;
+            }
+         }
+      }
+   }
+}
+
+
+void
+_swrast_map_renderbuffers(struct gl_context *ctx)
+{
+   map_unmap_renderbuffers(ctx, ctx->DrawBuffer, GL_TRUE);
+   if (ctx->ReadBuffer != ctx->DrawBuffer)
+      map_unmap_renderbuffers(ctx, ctx->ReadBuffer, GL_TRUE);
+}
+
+
+void
+_swrast_unmap_renderbuffers(struct gl_context *ctx)
+{
+   map_unmap_renderbuffers(ctx, ctx->DrawBuffer, GL_FALSE);
+   if (ctx->ReadBuffer != ctx->DrawBuffer)
+      map_unmap_renderbuffers(ctx, ctx->ReadBuffer, GL_FALSE);
+}