#include "main/glheader.h"
-#include "main/bufferobj.h"
#include "main/colormac.h"
-#include "main/convolve.h"
-#include "main/context.h"
#include "main/feedback.h"
#include "main/formats.h"
+#include "main/format_unpack.h"
#include "main/image.h"
-#include "main/macros.h"
#include "main/imports.h"
+#include "main/macros.h"
+#include "main/pack.h"
+#include "main/pbo.h"
#include "main/state.h"
#include "s_context.h"
#include "s_span.h"
#include "s_stencil.h"
+/**
+ * Tries to implement glReadPixels() of GL_DEPTH_COMPONENT using memcpy of the
+ * mapping.
+ */
+static GLboolean
+fast_read_depth_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ GLubyte *map, *dst;
+ int stride, dstStride, j;
+
+ if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0)
+ return GL_FALSE;
+
+ if (packing->SwapBytes)
+ return GL_FALSE;
+
+ if (_mesa_get_format_datatype(rb->Format) != GL_UNSIGNED_INT)
+ return GL_FALSE;
+
+ if (!((type == GL_UNSIGNED_SHORT && rb->Format == MESA_FORMAT_Z16) ||
+ type == GL_UNSIGNED_INT))
+ return GL_FALSE;
+
+ ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
+ &map, &stride);
+
+ dstStride = _mesa_image_row_stride(packing, width, GL_DEPTH_COMPONENT, type);
+ dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, 0, 0);
+
+ for (j = 0; j < height; j++) {
+ if (type == GL_UNSIGNED_INT) {
+ _mesa_unpack_uint_z_row(rb->Format, width, map, (GLuint *)dst);
+ } else {
+ ASSERT(type == GL_UNSIGNED_SHORT && rb->Format == MESA_FORMAT_Z16);
+ memcpy(dst, map, width * 2);
+ }
+
+ map += stride;
+ dst += dstStride;
+ }
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
+
+ return GL_TRUE;
+}
/**
* Read pixels for format=GL_DEPTH_COMPONENT.
*/
static void
-read_depth_pixels( GLcontext *ctx,
+read_depth_pixels( struct gl_context *ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
struct gl_framebuffer *fb = ctx->ReadBuffer;
- struct gl_renderbuffer *rb = fb->_DepthBuffer;
- const GLboolean biasOrScale
- = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ GLint j;
+ GLubyte *dst, *map;
+ int dstStride, stride;
if (!rb)
return;
/* width should never be > MAX_WIDTH since we did clipping earlier */
ASSERT(width <= MAX_WIDTH);
- if (type == GL_UNSIGNED_SHORT && fb->Visual.depthBits == 16
- && !biasOrScale && !packing->SwapBytes) {
- /* Special case: directly read 16-bit unsigned depth values. */
- GLint j;
- ASSERT(rb->Format == MESA_FORMAT_Z16);
- ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
- for (j = 0; j < height; j++, y++) {
- void *dest =_mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_COMPONENT, type, j, 0);
- rb->GetRow(ctx, rb, width, x, y, dest);
- }
- }
- else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 24
- && !biasOrScale && !packing->SwapBytes) {
- /* Special case: directly read 24-bit unsigned depth values. */
- GLint j;
- ASSERT(rb->Format == MESA_FORMAT_X8_Z24 ||
- rb->Format == MESA_FORMAT_S8_Z24 ||
- rb->Format == MESA_FORMAT_Z24_X8 ||
- rb->Format == MESA_FORMAT_Z24_S8);
- ASSERT(rb->DataType == GL_UNSIGNED_INT ||
- rb->DataType == GL_UNSIGNED_INT_24_8);
- for (j = 0; j < height; j++, y++) {
- GLuint *dest = (GLuint *)
- _mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_COMPONENT, type, j, 0);
- GLint k;
- rb->GetRow(ctx, rb, width, x, y, dest);
- /* convert range from 24-bit to 32-bit */
- if (rb->Format == MESA_FORMAT_X8_Z24 ||
- rb->Format == MESA_FORMAT_S8_Z24) {
- for (k = 0; k < width; k++) {
- /* Note: put MSByte of 24-bit value into LSByte */
- dest[k] = (dest[k] << 8) | ((dest[k] >> 16) & 0xff);
- }
- }
- else {
- for (k = 0; k < width; k++) {
- /* Note: fill in LSByte by replication */
- dest[k] = dest[k] | ((dest[k] >> 8) & 0xff);
- }
- }
- }
- }
- else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 32
- && !biasOrScale && !packing->SwapBytes) {
- /* Special case: directly read 32-bit unsigned depth values. */
- GLint j;
- ASSERT(rb->Format == MESA_FORMAT_Z32);
- ASSERT(rb->DataType == GL_UNSIGNED_INT);
- for (j = 0; j < height; j++, y++) {
- void *dest = _mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_COMPONENT, type, j, 0);
- rb->GetRow(ctx, rb, width, x, y, dest);
- }
- }
- else {
- /* General case (slower) */
- GLint j;
- for (j = 0; j < height; j++, y++) {
- GLfloat depthValues[MAX_WIDTH];
- GLvoid *dest = _mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_COMPONENT, type, j, 0);
- _swrast_read_depth_span_float(ctx, rb, width, x, y, depthValues);
- _mesa_pack_depth_span(ctx, width, dest, type, depthValues, packing);
- }
+ if (fast_read_depth_pixels(ctx, x, y, width, height, type, pixels, packing))
+ return;
+
+ dstStride = _mesa_image_row_stride(packing, width, GL_DEPTH_COMPONENT, type);
+ dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, 0, 0);
+
+ ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
+ &map, &stride);
+
+ /* General case (slower) */
+ for (j = 0; j < height; j++, y++) {
+ GLfloat depthValues[MAX_WIDTH];
+ _mesa_unpack_float_z_row(rb->Format, width, map, depthValues);
+ _mesa_pack_depth_span(ctx, width, dst, type, depthValues, packing);
+
+ dst += dstStride;
+ map += stride;
}
+
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
}
* Read pixels for format=GL_STENCIL_INDEX.
*/
static void
-read_stencil_pixels( GLcontext *ctx,
+read_stencil_pixels( struct gl_context *ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
struct gl_framebuffer *fb = ctx->ReadBuffer;
- struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
GLint j;
+ GLubyte *map;
+ GLint stride;
if (!rb)
return;
/* width should never be > MAX_WIDTH since we did clipping earlier */
ASSERT(width <= MAX_WIDTH);
+ ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
+ &map, &stride);
+
/* process image row by row */
- for (j=0;j<height;j++,y++) {
+ for (j = 0; j < height; j++) {
GLvoid *dest;
GLstencil stencil[MAX_WIDTH];
- _swrast_read_stencil_span(ctx, rb, width, x, y, stencil);
-
+ _mesa_unpack_ubyte_stencil_row(rb->Format, width, map, stencil);
dest = _mesa_image_address2d(packing, pixels, width, height,
GL_STENCIL_INDEX, type, j, 0);
_mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing);
- }
-}
+ map += stride;
+ }
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
+}
-/**
- * Optimized glReadPixels for particular pixel formats when pixel
- * scaling, biasing, mapping, etc. are disabled.
- * \return GL_TRUE if success, GL_FALSE if unable to do the readpixels
- */
static GLboolean
-fast_read_rgba_pixels( GLcontext *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing,
- GLbitfield transferOps)
+fast_read_rgba_pixels_memcpy( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing,
+ GLbitfield transferOps )
{
struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+ GLubyte *dst, *map;
+ int dstStride, stride, j, texelBytes;
- if (!rb)
+ if (!_mesa_format_matches_format_and_type(rb->Format, format, type))
return GL_FALSE;
- ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB);
-
- /* clipping should have already been done */
- ASSERT(x + width <= (GLint) rb->Width);
- ASSERT(y + height <= (GLint) rb->Height);
-
/* check for things we can't handle here */
- if (transferOps ||
- packing->SwapBytes ||
+ if (packing->SwapBytes ||
packing->LsbFirst) {
return GL_FALSE;
}
- if (format == GL_RGBA && rb->DataType == type) {
- const GLint dstStride = _mesa_image_row_stride(packing, width,
- format, type);
- GLubyte *dest
- = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
- format, type, 0, 0);
- GLint row;
- ASSERT(rb->GetRow);
- for (row = 0; row < height; row++) {
- rb->GetRow(ctx, rb, width, x, y + row, dest);
- dest += dstStride;
- }
- return GL_TRUE;
- }
+ dstStride = _mesa_image_row_stride(packing, width, format, type);
+ dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
- if (format == GL_RGB &&
- rb->DataType == GL_UNSIGNED_BYTE &&
- type == GL_UNSIGNED_BYTE) {
- const GLint dstStride = _mesa_image_row_stride(packing, width,
- format, type);
- GLubyte *dest
- = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
- format, type, 0, 0);
- GLint row;
- ASSERT(rb->GetRow);
- for (row = 0; row < height; row++) {
- GLubyte tempRow[MAX_WIDTH][4];
- GLint col;
- rb->GetRow(ctx, rb, width, x, y + row, tempRow);
- /* convert RGBA to RGB */
- for (col = 0; col < width; col++) {
- dest[col * 3 + 0] = tempRow[col][0];
- dest[col * 3 + 1] = tempRow[col][1];
- dest[col * 3 + 2] = tempRow[col][2];
- }
- dest += dstStride;
- }
- return GL_TRUE;
+ ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
+ &map, &stride);
+
+ texelBytes = _mesa_get_format_bytes(rb->Format);
+ for (j = 0; j < height; j++) {
+ memcpy(dst, map, width * texelBytes);
+ dst += dstStride;
+ map += stride;
}
- /* not handled */
- return GL_FALSE;
-}
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
+ return GL_TRUE;
+}
-/**
- * When we're using a low-precision color buffer (like 16-bit 5/6/5)
- * we have to adjust our color values a bit to pass conformance.
- * The problem is when a 5 or 6-bit color value is converted to an 8-bit
- * value and then a floating point value, the floating point values don't
- * increment uniformly as the 5 or 6-bit value is incremented.
- *
- * This function adjusts floating point values to compensate.
- */
-static void
-adjust_colors(const struct gl_framebuffer *fb, GLuint n, GLfloat rgba[][4])
+static GLboolean
+slow_read_rgba_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing,
+ GLbitfield transferOps )
{
- const GLuint rShift = 8 - fb->Visual.redBits;
- const GLuint gShift = 8 - fb->Visual.greenBits;
- const GLuint bShift = 8 - fb->Visual.blueBits;
- const GLfloat rScale = 1.0F / (GLfloat) ((1 << fb->Visual.redBits ) - 1);
- const GLfloat gScale = 1.0F / (GLfloat) ((1 << fb->Visual.greenBits) - 1);
- const GLfloat bScale = 1.0F / (GLfloat) ((1 << fb->Visual.blueBits ) - 1);
- GLuint i;
- for (i = 0; i < n; i++) {
- GLint r, g, b;
- /* convert float back to ubyte */
- CLAMPED_FLOAT_TO_UBYTE(r, rgba[i][RCOMP]);
- CLAMPED_FLOAT_TO_UBYTE(g, rgba[i][GCOMP]);
- CLAMPED_FLOAT_TO_UBYTE(b, rgba[i][BCOMP]);
- /* using only the N most significant bits of the ubyte value, convert to
- * float in [0,1].
- */
- rgba[i][RCOMP] = (GLfloat) (r >> rShift) * rScale;
- rgba[i][GCOMP] = (GLfloat) (g >> gShift) * gScale;
- rgba[i][BCOMP] = (GLfloat) (b >> bShift) * bScale;
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+ const gl_format rbFormat = _mesa_get_srgb_format_linear(rb->Format);
+ union {
+ float f[MAX_WIDTH][4];
+ unsigned int i[MAX_WIDTH][4];
+ } rgba;
+ GLubyte *dst, *map;
+ int dstStride, stride, j;
+
+ dstStride = _mesa_image_row_stride(packing, width, format, type);
+ dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+
+ ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
+ &map, &stride);
+
+ for (j = 0; j < height; j++) {
+ if (_mesa_is_integer_format(format)) {
+ _mesa_unpack_int_rgba_row(rbFormat, width, map, rgba.i);
+ _mesa_pack_rgba_span_int(ctx, width, rgba.i, format, type, dst);
+ } else {
+ _mesa_unpack_rgba_row(rbFormat, width, map, rgba.f);
+ _mesa_pack_rgba_span_float(ctx, width, rgba.f, format, type, dst,
+ packing, transferOps);
+ }
+ dst += dstStride;
+ map += stride;
}
-}
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
+ return GL_TRUE;
+}
/*
* Read R, G, B, A, RGB, L, or LA pixels.
*/
static void
-read_rgba_pixels( GLcontext *ctx,
+read_rgba_pixels( struct gl_context *ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum format, GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLbitfield transferOps = ctx->_ImageTransferState;
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct gl_renderbuffer *rb = fb->_ColorReadBuffer;
if (!rb)
return;
- if (type == GL_FLOAT && ((ctx->Color.ClampReadColor == GL_TRUE) ||
- (ctx->Color.ClampReadColor == GL_FIXED_ONLY_ARB &&
- rb->DataType != GL_FLOAT)))
+ if ((ctx->Color._ClampReadColor == GL_TRUE || type != GL_FLOAT) &&
+ !_mesa_is_integer_format(format)) {
transferOps |= IMAGE_CLAMP_BIT;
+ }
- /* Try optimized path first */
- if (fast_read_rgba_pixels(ctx, x, y, width, height,
- format, type, pixels, packing, transferOps)) {
- return; /* done! */
+ if (!transferOps) {
+ /* Try the optimized paths first. */
+ if (fast_read_rgba_pixels_memcpy(ctx, x, y, width, height,
+ format, type, pixels, packing,
+ transferOps)) {
+ return;
+ }
}
- /* width should never be > MAX_WIDTH since we did clipping earlier */
- ASSERT(width <= MAX_WIDTH);
+ slow_read_rgba_pixels(ctx, x, y, width, height,
+ format, type, pixels, packing, transferOps);
+}
- if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
- GLfloat *dest, *src, *tmpImage, *convImage;
- GLint row;
+/**
+ * For a packed depth/stencil buffer being read as depth/stencil, just memcpy the
+ * data (possibly swapping 8/24 vs 24/8 as we go).
+ */
+static GLboolean
+fast_read_depth_stencil_pixels(struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLubyte *dst, int dstStride)
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ GLubyte *map;
+ int stride, i;
- tmpImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
- if (!tmpImage) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
- return;
- }
- convImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
- if (!convImage) {
- free(tmpImage);
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
- return;
- }
+ if (rb != stencilRb)
+ return GL_FALSE;
- /* read full RGBA, FLOAT image */
- dest = tmpImage;
- for (row = 0; row < height; row++, y++) {
- _swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, dest);
- _mesa_apply_rgba_transfer_ops(ctx,
- transferOps & IMAGE_PRE_CONVOLUTION_BITS,
- width, (GLfloat (*)[4]) dest);
- dest += width * 4;
- }
+ if (rb->Format != MESA_FORMAT_Z24_S8 &&
+ rb->Format != MESA_FORMAT_S8_Z24)
+ return GL_FALSE;
- /* do convolution */
- if (ctx->Pixel.Convolution2DEnabled) {
- _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
- }
- else {
- ASSERT(ctx->Pixel.Separable2DEnabled);
- _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
- }
- free(tmpImage);
-
- /* finish transfer ops and pack the resulting image */
- src = convImage;
- for (row = 0; row < height; row++) {
- GLvoid *dest;
- dest = _mesa_image_address2d(packing, pixels, width, height,
- format, type, row, 0);
- _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) src,
- format, type, dest, packing,
- transferOps & IMAGE_POST_CONVOLUTION_BITS);
- src += width * 4;
- }
- free(convImage);
+ ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
+ &map, &stride);
+
+ for (i = 0; i < height; i++) {
+ _mesa_unpack_uint_24_8_depth_stencil_row(rb->Format, width,
+ map, (GLuint *)dst);
+ map += stride;
+ dst += dstStride;
}
- else {
- /* no convolution */
- const GLint dstStride
- = _mesa_image_row_stride(packing, width, format, type);
- GLfloat (*rgba)[4] = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0];
- GLint row;
- GLubyte *dst
- = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
- format, type, 0, 0);
-
- /* make sure we don't apply 1D convolution */
- transferOps &= ~(IMAGE_CONVOLUTION_BIT |
- IMAGE_POST_CONVOLUTION_SCALE_BIAS);
-
- for (row = 0; row < height; row++, y++) {
-
- /* Get float rgba pixels */
- _swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, rgba);
-
- /* apply fudge factor for shallow color buffers */
- if (fb->Visual.redBits < 8 ||
- fb->Visual.greenBits < 8 ||
- fb->Visual.blueBits < 8) {
- adjust_colors(fb, width, rgba);
- }
- /* pack the row of RGBA pixels into user's buffer */
- _mesa_pack_rgba_span_float(ctx, width, rgba, format, type, dst,
- packing, transferOps);
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
+
+ return GL_TRUE;
+}
+
+
+/**
+ * For non-float-depth and stencil buffers being read as 24/8 depth/stencil,
+ * copy the integer data directly instead of converting depth to float and
+ * re-packing.
+ */
+static GLboolean
+fast_read_depth_stencil_pixels_separate(struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ uint32_t *dst, int dstStride)
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *depthRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ GLubyte *depthMap, *stencilMap;
+ int depthStride, stencilStride, i, j;
+
+ if (_mesa_get_format_datatype(depthRb->Format) != GL_UNSIGNED_INT)
+ return GL_FALSE;
+
+ ctx->Driver.MapRenderbuffer(ctx, depthRb, x, y, width, height,
+ GL_MAP_READ_BIT, &depthMap, &depthStride);
+ ctx->Driver.MapRenderbuffer(ctx, stencilRb, x, y, width, height,
+ GL_MAP_READ_BIT, &stencilMap, &stencilStride);
- dst += dstStride;
+ for (j = 0; j < height; j++) {
+ GLstencil stencilVals[MAX_WIDTH];
+
+ _mesa_unpack_uint_z_row(depthRb->Format, width, depthMap, dst);
+ _mesa_unpack_ubyte_stencil_row(stencilRb->Format, width,
+ stencilMap, stencilVals);
+
+ for (i = 0; i < width; i++) {
+ dst[i] = (dst[i] & 0xffffff00) | stencilVals[i];
}
+
+ depthMap += depthStride;
+ stencilMap += stencilStride;
+ dst += dstStride / 4;
}
+
+ ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
+ ctx->Driver.UnmapRenderbuffer(ctx, stencilRb);
+
+ return GL_TRUE;
+}
+
+static void
+slow_read_depth_stencil_pixels_separate(struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type,
+ const struct gl_pixelstore_attrib *packing,
+ GLubyte *dst, int dstStride)
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *depthRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ GLubyte *depthMap, *stencilMap;
+ int depthStride, stencilStride, j;
+
+ ctx->Driver.MapRenderbuffer(ctx, depthRb, x, y, width, height,
+ GL_MAP_READ_BIT, &depthMap, &depthStride);
+ ctx->Driver.MapRenderbuffer(ctx, stencilRb, x, y, width, height,
+ GL_MAP_READ_BIT, &stencilMap, &stencilStride);
+
+ for (j = 0; j < height; j++) {
+ GLstencil stencilVals[MAX_WIDTH];
+ GLfloat depthVals[MAX_WIDTH];
+
+ _mesa_unpack_float_z_row(depthRb->Format, width, depthMap, depthVals);
+ _mesa_unpack_ubyte_stencil_row(stencilRb->Format, width,
+ stencilMap, stencilVals);
+
+ _mesa_pack_depth_stencil_span(ctx, width, type, (GLuint *)dst,
+ depthVals, stencilVals, packing);
+
+ depthMap += depthStride;
+ stencilMap += stencilStride;
+ dst += dstStride;
+ }
+
+ ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
+ ctx->Driver.UnmapRenderbuffer(ctx, stencilRb);
}
* depth and stencil buffers really exist.
*/
static void
-read_depth_stencil_pixels(GLcontext *ctx,
+read_depth_stencil_pixels(struct gl_context *ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum type, GLvoid *pixels,
= ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
const GLboolean stencilTransfer = ctx->Pixel.IndexShift
|| ctx->Pixel.IndexOffset || ctx->Pixel.MapStencilFlag;
- struct gl_renderbuffer *depthRb, *stencilRb;
-
- depthRb = ctx->ReadBuffer->_DepthBuffer;
- stencilRb = ctx->ReadBuffer->_StencilBuffer;
-
- if (!depthRb || !stencilRb)
- return;
-
- depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
- stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
-
- if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
- stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
- depthRb == stencilRb &&
- !scaleOrBias &&
- !stencilTransfer) {
- /* This is the ideal case.
- * Reading GL_DEPTH_STENCIL pixels from combined depth/stencil buffer.
- * Plus, no pixel transfer ops to worry about!
- */
- GLint i;
- GLint dstStride = _mesa_image_row_stride(packing, width,
- GL_DEPTH_STENCIL_EXT, type);
- GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, pixels,
- width, height,
- GL_DEPTH_STENCIL_EXT,
- type, 0, 0);
- for (i = 0; i < height; i++) {
- depthRb->GetRow(ctx, depthRb, width, x, y + i, dst);
- dst += dstStride;
- }
- }
- else {
- /* Reading GL_DEPTH_STENCIL pixels from separate depth/stencil buffers,
- * or we need pixel transfer.
- */
- GLint i;
- depthRb = ctx->ReadBuffer->_DepthBuffer;
- stencilRb = ctx->ReadBuffer->_StencilBuffer;
-
- for (i = 0; i < height; i++) {
- GLstencil stencilVals[MAX_WIDTH];
-
- GLuint *depthStencilDst = (GLuint *)
- _mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_STENCIL_EXT, type, i, 0);
-
- _swrast_read_stencil_span(ctx, stencilRb, width,
- x, y + i, stencilVals);
-
- if (!scaleOrBias && !stencilTransfer
- && ctx->ReadBuffer->Visual.depthBits == 24) {
- /* ideal case */
- GLuint zVals[MAX_WIDTH]; /* 24-bit values! */
- GLint j;
- ASSERT(depthRb->DataType == GL_UNSIGNED_INT);
- /* note, we've already been clipped */
- depthRb->GetRow(ctx, depthRb, width, x, y + i, zVals);
- for (j = 0; j < width; j++) {
- depthStencilDst[j] = (zVals[j] << 8) | (stencilVals[j] & 0xff);
- }
- }
- else {
- /* general case */
- GLfloat depthVals[MAX_WIDTH];
- _swrast_read_depth_span_float(ctx, depthRb, width, x, y + i,
- depthVals);
- _mesa_pack_depth_stencil_span(ctx, width, depthStencilDst,
- depthVals, stencilVals, packing);
- }
- }
+ GLubyte *dst;
+ int dstStride;
+
+ dst = (GLubyte *) _mesa_image_address2d(packing, pixels,
+ width, height,
+ GL_DEPTH_STENCIL_EXT,
+ type, 0, 0);
+ dstStride = _mesa_image_row_stride(packing, width,
+ GL_DEPTH_STENCIL_EXT, type);
+
+ /* Fast 24/8 reads. */
+ if (type == GL_UNSIGNED_INT_24_8 &&
+ !scaleOrBias && !stencilTransfer && !packing->SwapBytes) {
+ if (fast_read_depth_stencil_pixels(ctx, x, y, width, height,
+ dst, dstStride))
+ return;
+
+ if (fast_read_depth_stencil_pixels_separate(ctx, x, y, width, height,
+ (uint32_t *)dst, dstStride))
+ return;
}
+
+ slow_read_depth_stencil_pixels_separate(ctx, x, y, width, height,
+ type, packing,
+ dst, dstStride);
}
* By time we get here, all error checking will have been done.
*/
void
-_swrast_ReadPixels( GLcontext *ctx,
+_swrast_ReadPixels( struct gl_context *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *packing,
GLvoid *pixels )
{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct gl_pixelstore_attrib clippedPacking = *packing;
if (ctx->NewState)
_mesa_update_state(ctx);
- /* Need to do swrast_render_start() before clipping or anything else
- * since this is where a driver may grab the hw lock and get an updated
- * window size.
- */
- swrast_render_start(ctx);
-
- if (swrast->NewState)
- _swrast_validate_derived( ctx );
-
/* Do all needed clipping here, so that we can forget about it later */
- if (!_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
- /* The ReadPixels region is totally outside the window bounds */
- swrast_render_finish(ctx);
- return;
- }
-
- pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
- if (!pixels)
- return;
-
- switch (format) {
- case GL_STENCIL_INDEX:
- read_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ if (_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
+
+ pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
+
+ if (pixels) {
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ read_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ case GL_DEPTH_COMPONENT:
+ read_depth_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ default:
+ /* all other formats should be color formats */
+ read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
&clippedPacking);
- break;
- case GL_DEPTH_COMPONENT:
- read_depth_pixels(ctx, x, y, width, height, type, pixels,
- &clippedPacking);
- break;
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_RGB:
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_RGBA:
- case GL_BGR:
- case GL_BGRA:
- case GL_ABGR_EXT:
- read_rgba_pixels(ctx, x, y, width, height,
- format, type, pixels, &clippedPacking);
- break;
- case GL_DEPTH_STENCIL_EXT:
- read_depth_stencil_pixels(ctx, x, y, width, height,
- type, pixels, &clippedPacking);
- break;
- default:
- _mesa_problem(ctx, "unexpected format in _swrast_ReadPixels");
- /* don't return yet, clean-up */
- }
-
- swrast_render_finish(ctx);
+ }
- _mesa_unmap_pbo_dest(ctx, &clippedPacking);
+ _mesa_unmap_pbo_dest(ctx, &clippedPacking);
+ }
+ }
}
projects / mesa.git / blobdiff