2 * Mesa 3-D graphics library
4 * Copyright (C) 2015 Intel Corporation. All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
25 * Jason Ekstrand <jason.ekstrand@intel.com>
29 #include "bufferobj.h"
33 #include "framebuffer.h"
34 #include "glformats.h"
41 #include "shaderapi.h"
50 need_signed_unsigned_int_conversion(mesa_format mesaFormat,
51 GLenum format, GLenum type)
53 const GLenum mesaFormatType = _mesa_get_format_datatype(mesaFormat);
54 const bool is_format_integer = _mesa_is_enum_format_integer(format);
55 return (mesaFormatType == GL_INT &&
57 (type == GL_UNSIGNED_INT ||
58 type == GL_UNSIGNED_SHORT ||
59 type == GL_UNSIGNED_BYTE)) ||
60 (mesaFormatType == GL_UNSIGNED_INT &&
67 static struct gl_texture_image *
68 create_texture_for_pbo(struct gl_context *ctx,
69 bool create_pbo, GLenum pbo_target,
70 int dims, int width, int height, int depth,
71 GLenum format, GLenum type, const void *pixels,
72 const struct gl_pixelstore_attrib *packing,
73 struct gl_buffer_object **tmp_pbo, GLuint *tmp_tex)
76 GLenum internal_format;
78 struct gl_buffer_object *buffer_obj;
79 struct gl_texture_object *tex_obj;
80 struct gl_texture_image *tex_image;
83 if (packing->SwapBytes ||
88 pbo_format = _mesa_format_from_format_and_type(format, type);
89 if (_mesa_format_is_mesa_array_format(pbo_format))
90 pbo_format = _mesa_format_from_array_format(pbo_format);
92 if (!pbo_format || !ctx->TextureFormatSupported[pbo_format])
95 /* Account for SKIP_PIXELS, SKIP_ROWS, ALIGNMENT, and SKIP_IMAGES */
96 uint32_t first_pixel = _mesa_image_offset(dims, packing, width, height,
99 uint32_t last_pixel = _mesa_image_offset(dims, packing, width, height,
101 depth-1, height-1, width);
102 row_stride = _mesa_image_row_stride(packing, width, format, type);
104 if (_mesa_is_bufferobj(packing->BufferObj)) {
106 buffer_obj = packing->BufferObj;
107 first_pixel += (intptr_t)pixels;
109 bool is_pixel_pack = pbo_target == GL_PIXEL_PACK_BUFFER;
113 *tmp_pbo = ctx->Driver.NewBufferObject(ctx, 0xDEADBEEF);
114 if (*tmp_pbo == NULL)
117 /* In case of GL_PIXEL_PACK_BUFFER, pass null pointer for the pixel
118 * data to avoid unnecessary data copying in _mesa_buffer_data.
121 _mesa_buffer_data(ctx, *tmp_pbo, GL_NONE,
122 last_pixel - first_pixel,
127 _mesa_buffer_data(ctx, *tmp_pbo, GL_NONE,
128 last_pixel - first_pixel,
129 (char *)pixels + first_pixel,
133 buffer_obj = *tmp_pbo;
137 _mesa_GenTextures(1, tmp_tex);
138 tex_obj = _mesa_lookup_texture(ctx, *tmp_tex);
139 _mesa_initialize_texture_object(ctx, tex_obj, *tmp_tex, GL_TEXTURE_2D);
140 /* This must be set after _mesa_initialize_texture_object, not before. */
141 tex_obj->Immutable = GL_TRUE;
142 /* This is required for interactions with ARB_texture_view. */
143 tex_obj->NumLayers = 1;
145 internal_format = _mesa_get_format_base_format(pbo_format);
147 /* The texture is addressed as a single very-tall image, so we
148 * need to pack the multiple image depths together taking the
149 * inter-image padding into account.
151 int image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight;
152 int full_height = image_height * (depth - 1) + height;
154 tex_image = _mesa_get_tex_image(ctx, tex_obj, tex_obj->Target, 0);
155 _mesa_init_teximage_fields(ctx, tex_image, width, full_height, 1,
156 0, internal_format, pbo_format);
158 read_only = pbo_target == GL_PIXEL_UNPACK_BUFFER;
159 if (!ctx->Driver.SetTextureStorageForBufferObject(ctx, tex_obj,
164 _mesa_DeleteTextures(1, tmp_tex);
165 _mesa_reference_buffer_object(ctx, tmp_pbo, NULL);
173 _mesa_meta_pbo_TexSubImage(struct gl_context *ctx, GLuint dims,
174 struct gl_texture_image *tex_image,
175 int xoffset, int yoffset, int zoffset,
176 int width, int height, int depth,
177 GLenum format, GLenum type, const void *pixels,
178 bool allocate_storage, bool create_pbo,
179 const struct gl_pixelstore_attrib *packing)
181 struct gl_buffer_object *pbo = NULL;
183 struct gl_framebuffer *readFb = NULL;
184 struct gl_framebuffer *drawFb = NULL;
186 struct gl_texture_image *pbo_tex_image;
188 bool success = false;
191 if (!_mesa_is_bufferobj(packing->BufferObj) &&
192 (!create_pbo || pixels == NULL))
195 if (format == GL_DEPTH_COMPONENT ||
196 format == GL_DEPTH_STENCIL ||
197 format == GL_STENCIL_INDEX ||
198 format == GL_COLOR_INDEX)
201 if (ctx->_ImageTransferState)
204 /* This function rely on BlitFramebuffer to fill in the pixel data for
205 * glTex[Sub]Image*D. But, BlitFrameBuffer doesn't support signed to
206 * unsigned or unsigned to signed integer conversions.
208 if (need_signed_unsigned_int_conversion(tex_image->TexFormat, format, type))
211 /* For arrays, use a tall (height * depth) 2D texture but taking into
212 * account the inter-image padding specified with the image height packing
215 image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight;
217 pbo_tex_image = create_texture_for_pbo(ctx, create_pbo,
218 GL_PIXEL_UNPACK_BUFFER,
219 dims, width, height, depth,
220 format, type, pixels, packing,
225 if (allocate_storage)
226 ctx->Driver.AllocTextureImageBuffer(ctx, tex_image);
228 _mesa_meta_begin(ctx, ~(MESA_META_PIXEL_TRANSFER |
229 MESA_META_PIXEL_STORE));
231 readFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF);
235 drawFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF);
239 _mesa_bind_framebuffers(ctx, drawFb, tex_image ? readFb : ctx->ReadBuffer);
241 if (tex_image->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
243 assert(zoffset == 0);
251 _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer,
252 GL_COLOR_ATTACHMENT0,
254 /* If this passes on the first layer it should pass on the others */
255 status = _mesa_check_framebuffer_status(ctx, ctx->ReadBuffer);
256 if (status != GL_FRAMEBUFFER_COMPLETE)
259 _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer,
260 GL_COLOR_ATTACHMENT0,
262 /* If this passes on the first layer it should pass on the others */
263 status = _mesa_check_framebuffer_status(ctx, ctx->DrawBuffer);
264 if (status != GL_FRAMEBUFFER_COMPLETE)
267 _mesa_update_state(ctx);
269 if (_mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
272 xoffset + width, yoffset + height,
273 GL_COLOR_BUFFER_BIT, GL_NEAREST))
276 for (z = 1; z < depth; z++) {
277 _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer,
278 GL_COLOR_ATTACHMENT0,
279 tex_image, zoffset + z);
281 _mesa_update_state(ctx);
283 _mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
285 width, z * image_height + height,
287 xoffset + width, yoffset + height,
288 GL_COLOR_BUFFER_BIT, GL_NEAREST);
294 _mesa_reference_framebuffer(&readFb, NULL);
295 _mesa_reference_framebuffer(&drawFb, NULL);
296 _mesa_DeleteTextures(1, &pbo_tex);
297 _mesa_reference_buffer_object(ctx, &pbo, NULL);
305 _mesa_meta_pbo_GetTexSubImage(struct gl_context *ctx, GLuint dims,
306 struct gl_texture_image *tex_image,
307 int xoffset, int yoffset, int zoffset,
308 int width, int height, int depth,
309 GLenum format, GLenum type, const void *pixels,
310 const struct gl_pixelstore_attrib *packing)
312 struct gl_buffer_object *pbo = NULL;
314 struct gl_framebuffer *readFb;
315 struct gl_framebuffer *drawFb;
317 struct gl_texture_image *pbo_tex_image;
318 struct gl_renderbuffer *rb = NULL;
319 GLenum dstBaseFormat = _mesa_unpack_format_to_base_format(format);
320 GLenum status, src_base_format;
321 bool success = false, clear_channels_to_zero = false;
322 float save_clear_color[4];
325 if (!_mesa_is_bufferobj(packing->BufferObj))
328 if (format == GL_DEPTH_COMPONENT ||
329 format == GL_DEPTH_STENCIL ||
330 format == GL_STENCIL_INDEX ||
331 format == GL_COLOR_INDEX)
334 /* Don't use meta path for readpixels in below conditions. */
336 rb = ctx->ReadBuffer->_ColorReadBuffer;
338 /* _mesa_get_readpixels_transfer_ops() includes the cases of read
339 * color clamping along with the ctx->_ImageTransferState.
341 if (_mesa_get_readpixels_transfer_ops(ctx, rb->Format, format,
345 if (_mesa_need_rgb_to_luminance_conversion(rb->_BaseFormat,
349 /* This function rely on BlitFramebuffer to fill in the pixel data for
350 * ReadPixels. But, BlitFrameBuffer doesn't support signed to unsigned
351 * or unsigned to signed integer conversions. OpenGL spec expects an
352 * invalid operation in that case.
354 if (need_signed_unsigned_int_conversion(rb->Format, format, type))
358 /* For arrays, use a tall (height * depth) 2D texture but taking into
359 * account the inter-image padding specified with the image height packing
362 image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight;
364 pbo_tex_image = create_texture_for_pbo(ctx, false, GL_PIXEL_PACK_BUFFER,
365 dims, width, height, depth,
366 format, type, pixels, packing,
371 _mesa_meta_begin(ctx, ~(MESA_META_PIXEL_TRANSFER |
372 MESA_META_PIXEL_STORE));
374 /* GL_CLAMP_FRAGMENT_COLOR doesn't affect ReadPixels and GettexImage */
375 if (ctx->Extensions.ARB_color_buffer_float)
376 _mesa_ClampColor(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
378 readFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF);
382 drawFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF);
386 if (tex_image && tex_image->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
388 assert(zoffset == 0);
396 /* If we were given a texture, bind it to the read framebuffer. If not,
397 * we're doing a ReadPixels and we should just use whatever framebuffer
398 * the client has bound.
400 _mesa_bind_framebuffers(ctx, drawFb, tex_image ? readFb : ctx->ReadBuffer);
402 _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer,
403 GL_COLOR_ATTACHMENT0,
405 /* If this passes on the first layer it should pass on the others */
406 status = _mesa_check_framebuffer_status(ctx, ctx->ReadBuffer);
407 if (status != GL_FRAMEBUFFER_COMPLETE)
413 _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer,
414 GL_COLOR_ATTACHMENT0,
416 /* If this passes on the first layer it should pass on the others */
417 status = _mesa_check_framebuffer_status(ctx, ctx->DrawBuffer);
418 if (status != GL_FRAMEBUFFER_COMPLETE)
421 _mesa_update_state(ctx);
423 if (_mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
425 xoffset + width, yoffset + height,
427 GL_COLOR_BUFFER_BIT, GL_NEAREST))
430 src_base_format = tex_image ?
431 tex_image->_BaseFormat :
432 ctx->ReadBuffer->_ColorReadBuffer->_BaseFormat;
434 /* Depending on the base formats involved we might need to rebase some
435 * values. For example if we download from a Luminance format to RGBA
436 * format, we want G=0 and B=0.
438 clear_channels_to_zero =
439 _mesa_need_luminance_to_rgb_conversion(src_base_format,
440 pbo_tex_image->_BaseFormat);
442 if (clear_channels_to_zero) {
443 memcpy(save_clear_color, ctx->Color.ClearColor.f, 4 * sizeof(float));
444 /* Clear the Green, Blue channels. */
445 _mesa_ColorMask(GL_FALSE, GL_TRUE, GL_TRUE,
446 src_base_format != GL_LUMINANCE_ALPHA);
447 _mesa_ClearColor(0.0, 0.0, 0.0, 1.0);
448 _mesa_Clear(GL_COLOR_BUFFER_BIT);
451 for (z = 1; z < depth; z++) {
452 _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer,
453 GL_COLOR_ATTACHMENT0,
454 tex_image, zoffset + z);
456 _mesa_update_state(ctx);
458 _mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
460 xoffset + width, yoffset + height,
462 width, z * image_height + height,
463 GL_COLOR_BUFFER_BIT, GL_NEAREST);
464 if (clear_channels_to_zero)
465 _mesa_Clear(GL_COLOR_BUFFER_BIT);
468 /* Unmask the color channels and restore the saved clear color values. */
469 if (clear_channels_to_zero) {
470 _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
471 _mesa_ClearColor(save_clear_color[0], save_clear_color[1],
472 save_clear_color[2], save_clear_color[3]);
478 _mesa_reference_framebuffer(&drawFb, NULL);
479 _mesa_reference_framebuffer(&readFb, NULL);
480 _mesa_DeleteTextures(1, &pbo_tex);
481 _mesa_reference_buffer_object(ctx, &pbo, NULL);