#include "main/context.h"
#include "main/fbobject.h"
#include "main/teximage.h"
+#include "main/texobj.h"
#include "swrast/swrast.h"
#include "swrast/s_context.h"
*/
GLboolean
_swrast_alloc_texture_image_buffer(struct gl_context *ctx,
- struct gl_texture_image *texImage,
- gl_format format, GLsizei width,
- GLsizei height, GLsizei depth)
+ struct gl_texture_image *texImage)
{
struct swrast_texture_image *swImg = swrast_texture_image(texImage);
- GLuint bytes = _mesa_format_image_size(format, width, height, depth);
+ GLuint bytes = _mesa_format_image_size(texImage->TexFormat, texImage->Width,
+ texImage->Height, texImage->Depth);
+ GLuint i;
- /* This _should_ be true (revisit if these ever fail) */
- assert(texImage->Width == width);
- assert(texImage->Height == height);
- assert(texImage->Depth == depth);
+ assert(!swImg->Buffer);
+ swImg->Buffer = _mesa_align_malloc(bytes, 512);
+ if (!swImg->Buffer)
+ return GL_FALSE;
- assert(!texImage->Data);
- texImage->Data = _mesa_align_malloc(bytes, 512);
+ /* RowStride and ImageOffsets[] describe how to address texels in 'Data' */
+ swImg->RowStride = texImage->Width;
- if ((width == 1 || _mesa_is_pow_two(texImage->Width2)) &&
- (height == 1 || _mesa_is_pow_two(texImage->Height2)) &&
- (depth == 1 || _mesa_is_pow_two(texImage->Depth2)))
+ /* Allocate the ImageOffsets array and initialize to typical values.
+ * We allocate the array for 1D/2D textures too in order to avoid special-
+ * case code in the texstore routines.
+ */
+ swImg->ImageOffsets = malloc(texImage->Depth * sizeof(GLuint));
+ if (!swImg->ImageOffsets)
+ return GL_FALSE;
+
+ for (i = 0; i < texImage->Depth; i++) {
+ swImg->ImageOffsets[i] = i * texImage->Width * texImage->Height;
+ }
+
+ _swrast_init_texture_image(texImage);
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Code that overrides ctx->Driver.AllocTextureImageBuffer may use this to
+ * initialize the fields of swrast_texture_image without allocating the image
+ * buffer or initializing ImageOffsets or RowStride.
+ *
+ * Returns GL_TRUE on success, GL_FALSE on memory allocation failure.
+ */
+void
+_swrast_init_texture_image(struct gl_texture_image *texImage)
+{
+ struct swrast_texture_image *swImg = swrast_texture_image(texImage);
+
+ if ((texImage->Width == 1 || _mesa_is_pow_two(texImage->Width2)) &&
+ (texImage->Height == 1 || _mesa_is_pow_two(texImage->Height2)) &&
+ (texImage->Depth == 1 || _mesa_is_pow_two(texImage->Depth2)))
swImg->_IsPowerOfTwo = GL_TRUE;
else
swImg->_IsPowerOfTwo = GL_FALSE;
- return texImage->Data != NULL;
+ /* Compute Width/Height/DepthScale for mipmap lod computation */
+ if (texImage->TexObject->Target == GL_TEXTURE_RECTANGLE_NV) {
+ /* scale = 1.0 since texture coords directly map to texels */
+ swImg->WidthScale = 1.0;
+ swImg->HeightScale = 1.0;
+ swImg->DepthScale = 1.0;
+ }
+ else {
+ swImg->WidthScale = (GLfloat) texImage->Width;
+ swImg->HeightScale = (GLfloat) texImage->Height;
+ swImg->DepthScale = (GLfloat) texImage->Depth;
+ }
}
_swrast_free_texture_image_buffer(struct gl_context *ctx,
struct gl_texture_image *texImage)
{
- if (texImage->Data && !texImage->IsClientData) {
- _mesa_align_free(texImage->Data);
+ struct swrast_texture_image *swImage = swrast_texture_image(texImage);
+ if (swImage->Buffer) {
+ _mesa_align_free(swImage->Buffer);
+ swImage->Buffer = NULL;
}
- texImage->Data = NULL;
+ free(swImage->ImageOffsets);
+ swImage->ImageOffsets = NULL;
}
GLubyte **mapOut,
GLint *rowStrideOut)
{
+ struct swrast_texture_image *swImage = swrast_texture_image(texImage);
GLubyte *map;
GLint stride, texelSize;
GLuint bw, bh;
stride = _mesa_format_row_stride(texImage->TexFormat, texImage->Width);
_mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
- assert(texImage->Data);
+ assert(x % bw == 0);
+ assert(y % bh == 0);
- map = texImage->Data;
+ if (!swImage->Buffer) {
+ /* probably ran out of memory when allocating tex mem */
+ *mapOut = NULL;
+ return;
+ }
+
+ map = swImage->Buffer;
if (texImage->TexObject->Target == GL_TEXTURE_3D ||
texImage->TexObject->Target == GL_TEXTURE_2D_ARRAY) {
1);
assert(slice < texImage->Depth);
map += slice * sliceSize;
+ } else if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
+ GLuint sliceSize = _mesa_format_image_size(texImage->TexFormat,
+ texImage->Width,
+ 1,
+ 1);
+ assert(slice < texImage->Height);
+ map += slice * sliceSize;
}
/* apply x/y offset to map address */
{
/* nop */
}
+
+
+void
+_swrast_map_texture(struct gl_context *ctx, struct gl_texture_object *texObj)
+{
+ const GLuint faces = _mesa_num_tex_faces(texObj->Target);
+ 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->Map = swImage->Buffer;
+ }
+ }
+ }
+}
+
+
+void
+_swrast_unmap_texture(struct gl_context *ctx, struct gl_texture_object *texObj)
+{
+ const GLuint faces = _mesa_num_tex_faces(texObj->Target);
+ 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->Map = 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);
+ }
+}
+
+
+/**
+ * Called via ctx->Driver.AllocTextureStorage()
+ * Just have to allocate memory for the texture images.
+ */
+GLboolean
+_swrast_AllocTextureStorage(struct gl_context *ctx,
+ struct gl_texture_object *texObj,
+ GLsizei levels, GLsizei width,
+ GLsizei height, GLsizei depth)
+{
+ const GLint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+ GLint face, level;
+
+ for (face = 0; face < numFaces; face++) {
+ for (level = 0; level < levels; level++) {
+ struct gl_texture_image *texImage = texObj->Image[face][level];
+ if (!_swrast_alloc_texture_image_buffer(ctx, texImage)) {
+ return GL_FALSE;
+ }
+ }
+ }
+
+ return GL_TRUE;
+}
+
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