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28 #include "main/mtypes.h"

29 #include "main/enums.h"

30 #include "main/image.h"

31 #include "main/teximage.h"

32 #include "main/texstate.h"

34 #include "drivers/common/meta.h"

36 #include "intel_screen.h"

37 #include "intel_context.h"

38 #include "intel_mipmap_tree.h"

39 #include "intel_regions.h"

40 #include "intel_fbo.h"

41 #include "intel_tex.h"

42 #include "intel_blit.h"

44 #define FILE_DEBUG_FLAG DEBUG_TEXTURE

46 /**

47 * Get the intel_region which is the source for any glCopyTex[Sub]Image call.

48 *

49 * Do the best we can using the blitter. A future project is to use

50 * the texture engine and fragment programs for these copies.

51 */

52 static struct intel_renderbuffer *

 get_teximage_readbuffer(struct intel_context *intel, GLenum internalFormat)

54 {

    DBG("%s %s\n", __FUNCTION__,

56 _mesa_lookup_enum_by_nr(internalFormat));

    if (_mesa_is_depth_format(internalFormat) ||

59 _mesa_is_depthstencil_format(internalFormat))

       return intel_get_renderbuffer(intel->ctx.ReadBuffer, BUFFER_DEPTH);

    return intel_renderbuffer(intel->ctx.ReadBuffer->_ColorReadBuffer);

63 }

66 GLboolean

 intel_copy_texsubimage(struct intel_context *intel,

68 GLenum target,

69 struct intel_texture_image *intelImage,

70 GLenum internalFormat,

71 GLint dstx, GLint dsty,

72 GLint x, GLint y, GLsizei width, GLsizei height)

73 {

    struct gl_context *ctx = &intel->ctx;

75 struct intel_renderbuffer *irb;

76 bool copy_supported = false;

77 bool copy_supported_with_alpha_override = false;

79 intel_prepare_render(intel);

    irb = get_teximage_readbuffer(intel, internalFormat);

    if (!intelImage->mt || !irb || !irb->region) {

       if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))

          fprintf(stderr, "%s fail %p %p (0x%08x)\n",

                  __FUNCTION__, intelImage->mt, irb, internalFormat);

86 return GL_FALSE;

87 }

    copy_supported = intelImage->base.TexFormat == irb->Base.Format;

91 /* Converting ARGB8888 to XRGB8888 is trivial: ignore the alpha bits */

    if (irb->Base.Format == MESA_FORMAT_ARGB8888 &&

93 intelImage->base.TexFormat == MESA_FORMAT_XRGB8888) {

94 copy_supported = true;

95 }

97 /* Converting XRGB8888 to ARGB8888 requires setting the alpha bits to 1.0 */

    if (irb->Base.Format == MESA_FORMAT_XRGB8888 &&

99 intelImage->base.TexFormat == MESA_FORMAT_ARGB8888) {

100 copy_supported_with_alpha_override = true;

101 }

102

103 if (!copy_supported && !copy_supported_with_alpha_override) {

       if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))

          fprintf(stderr, "%s mismatched formats %s, %s\n",

106 __FUNCTION__,

                  _mesa_get_format_name(intelImage->base.TexFormat),

                  _mesa_get_format_name(irb->Base.Format));

109 return GL_FALSE;

110 }

111

112 {

       drm_intel_bo *dst_bo = intel_region_buffer(intel,

114 intelImage->mt->region,

115 INTEL_WRITE_PART);

116 GLuint image_x, image_y;

117 GLshort src_pitch;

118

119 /* get dest x/y in destination texture */

120 intel_miptree_get_image_offset(intelImage->mt,

121 intelImage->level,

122 intelImage->face,

123 0,

124 &image_x, &image_y);

125

126 /* The blitter can't handle Y-tiled buffers. */

       if (intelImage->mt->region->tiling == I915_TILING_Y) {

128 return GL_FALSE;

129 }

130

       if (ctx->ReadBuffer->Name == 0) {

132 /* Flip vertical orientation for system framebuffers */

          y = ctx->ReadBuffer->Height - (y + height);

134 src_pitch = -irb->region->pitch;

135 } else {

136 /* reading from a FBO, y is already oriented the way we like */

137 src_pitch = irb->region->pitch;

138 }

139

140 /* blit from src buffer to texture */

       if (!intelEmitCopyBlit(intel,

142 intelImage->mt->cpp,

143 src_pitch,

144 irb->region->buffer,

145 0,

146 irb->region->tiling,

147 intelImage->mt->region->pitch,

148 dst_bo,

149 0,

150 intelImage->mt->region->tiling,

                              irb->draw_x + x, irb->draw_y + y,

152 image_x + dstx, image_y + dsty,

153 width, height,

154 GL_COPY)) {

155 return GL_FALSE;

156 }

157 }

158

159 if (copy_supported_with_alpha_override)

160 intel_set_teximage_alpha_to_one(ctx, intelImage);

161

162 return GL_TRUE;

163 }

164

165

166 static void

 intelCopyTexSubImage1D(struct gl_context * ctx, GLenum target, GLint level,

168 GLint xoffset, GLint x, GLint y, GLsizei width)

169 {

    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);

171 struct gl_texture_object *texObj =

       _mesa_select_tex_object(ctx, texUnit, target);

173 struct gl_texture_image *texImage =

       _mesa_select_tex_image(ctx, texObj, target, level);

175 GLenum internalFormat = texImage->InternalFormat;

176

177 /* XXX need to check <border> as in above function? */

178

179 /* Need to check texture is compatible with source format.

180 */

181

    if (!intel_copy_texsubimage(intel_context(ctx), target,

183 intel_texture_image(texImage),

                                internalFormat, xoffset, 0, x, y, width, 1)) {

       fallback_debug("%s - fallback to swrast\n", __FUNCTION__);

       _mesa_meta_CopyTexSubImage1D(ctx, target, level, xoffset, x, y, width);

187 }

188 }

189

190

191 static void

 intelCopyTexSubImage2D(struct gl_context * ctx, GLenum target, GLint level,

193 GLint xoffset, GLint yoffset,

194 GLint x, GLint y, GLsizei width, GLsizei height)

195 {

    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);

197 struct gl_texture_object *texObj =

       _mesa_select_tex_object(ctx, texUnit, target);

199 struct gl_texture_image *texImage =

       _mesa_select_tex_image(ctx, texObj, target, level);

201 GLenum internalFormat = texImage->InternalFormat;

202

203 /* Need to check texture is compatible with source format.

204 */

205

    if (!intel_copy_texsubimage(intel_context(ctx), target,

207 intel_texture_image(texImage),

208 internalFormat,

                                xoffset, yoffset, x, y, width, height)) {

       fallback_debug("%s - fallback to swrast\n", __FUNCTION__);

       _mesa_meta_CopyTexSubImage2D(ctx, target, level,

                                    xoffset, yoffset, x, y, width, height);

213 }

214 }

215

216

217 void

 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)

219 {

220 functions->CopyTexSubImage1D = intelCopyTexSubImage1D;

221 functions->CopyTexSubImage2D = intelCopyTexSubImage2D;

222 }