static struct pipe_texture *
create_color_map_texture(GLcontext *ctx)
{
struct pipe_context *pipe = ctx->st->pipe;
struct pipe_texture *pt;
enum pipe_format format;
const uint texSize = 256; /* simple, and usually perfect */
/* find an RGBA texture format */
format = st_choose_format(pipe, GL_RGBA, PIPE_TEXTURE_2D, PIPE_TEXTURE_USAGE_SAMPLER);
/* create texture for color map/table */
pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, format, 0,
texSize, texSize, 1, PIPE_TEXTURE_USAGE_SAMPLER);
return pt;
}
struct pipe_resource *
st_create_color_map_texture(struct gl_context *ctx)
{
struct st_context *st = st_context(ctx);
struct pipe_resource *pt;
enum pipe_format format;
const uint texSize = 256; /* simple, and usually perfect */
/* find an RGBA texture format */
format = st_choose_format(st, GL_RGBA, GL_NONE, GL_NONE,
PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW,
FALSE);
/* create texture for color map/table */
pt = st_texture_create(st, PIPE_TEXTURE_2D, format, 0,
texSize, texSize, 1, 1, 0, PIPE_BIND_SAMPLER_VIEW);
return pt;
}
/**
* Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
* which GL extensions are supported.
* Quite a few extensions are always supported because they are standard
* features or can be built on top of other gallium features.
* Some fine tuning may still be needed.
*/
void st_init_extensions(struct st_context *st)
{
struct pipe_screen *screen = st->pipe->screen;
struct gl_context *ctx = st->ctx;
int i, glsl_feature_level;
GLboolean *extensions = (GLboolean *) &ctx->Extensions;
static const struct st_extension_cap_mapping cap_mapping[] = {
{ o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
{ o(ARB_buffer_storage), PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
{ o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
{ o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
{ o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
{ o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
{ o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
{ o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
{ o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
{ o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
{ o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
{ o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
{ o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
{ o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
{ o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
{ o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
{ o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
{ o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
{ o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
{ o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
{ o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
{ o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
{ o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
{ o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
{ o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
{ o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
{ o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
{ o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
{ o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
{ o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
{ o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
{ o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
{ o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
/* GL_NV_point_sprite is not supported by gallium because we don't
* support the GL_POINT_SPRITE_R_MODE_NV option. */
{ o(OES_standard_derivatives), PIPE_CAP_SM3 },
{ o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
{ o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE }
};
/* Required: render target and sampler support */
static const struct st_extension_format_mapping rendertarget_mapping[] = {
{ { o(ARB_texture_float) },
{ PIPE_FORMAT_R32G32B32A32_FLOAT,
PIPE_FORMAT_R16G16B16A16_FLOAT } },
{ { o(ARB_texture_rgb10_a2ui) },
{ PIPE_FORMAT_R10G10B10A2_UINT,
PIPE_FORMAT_B10G10R10A2_UINT },
GL_TRUE }, /* at least one format must be supported */
{ { o(EXT_framebuffer_sRGB) },
{ PIPE_FORMAT_A8B8G8R8_SRGB,
PIPE_FORMAT_B8G8R8A8_SRGB },
GL_TRUE }, /* at least one format must be supported */
{ { o(EXT_packed_float) },
{ PIPE_FORMAT_R11G11B10_FLOAT } },
{ { o(EXT_texture_integer) },
{ PIPE_FORMAT_R32G32B32A32_UINT,
PIPE_FORMAT_R32G32B32A32_SINT } },
{ { o(ARB_texture_rg) },
{ PIPE_FORMAT_R8_UNORM,
PIPE_FORMAT_R8G8_UNORM } },
};
/* Required: depth stencil and sampler support */
static const struct st_extension_format_mapping depthstencil_mapping[] = {
{ { o(ARB_depth_buffer_float) },
{ PIPE_FORMAT_Z32_FLOAT,
PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
};
/* Required: sampler support */
static const struct st_extension_format_mapping texture_mapping[] = {
{ { o(ARB_texture_compression_rgtc) },
{ PIPE_FORMAT_RGTC1_UNORM,
PIPE_FORMAT_RGTC1_SNORM,
PIPE_FORMAT_RGTC2_UNORM,
PIPE_FORMAT_RGTC2_SNORM } },
{ { o(EXT_texture_compression_latc) },
{ PIPE_FORMAT_LATC1_UNORM,
PIPE_FORMAT_LATC1_SNORM,
PIPE_FORMAT_LATC2_UNORM,
PIPE_FORMAT_LATC2_SNORM } },
{ { o(EXT_texture_compression_s3tc),
o(ANGLE_texture_compression_dxt) },
{ PIPE_FORMAT_DXT1_RGB,
PIPE_FORMAT_DXT1_RGBA,
PIPE_FORMAT_DXT3_RGBA,
PIPE_FORMAT_DXT5_RGBA } },
{ { o(EXT_texture_shared_exponent) },
{ PIPE_FORMAT_R9G9B9E5_FLOAT } },
{ { o(EXT_texture_snorm) },
{ PIPE_FORMAT_R8G8B8A8_SNORM } },
{ { o(EXT_texture_sRGB),
o(EXT_texture_sRGB_decode) },
{ PIPE_FORMAT_A8B8G8R8_SRGB,
PIPE_FORMAT_B8G8R8A8_SRGB },
GL_TRUE }, /* at least one format must be supported */
{ { o(ATI_texture_compression_3dc) },
{ PIPE_FORMAT_LATC2_UNORM } },
{ { o(MESA_ycbcr_texture) },
{ PIPE_FORMAT_UYVY,
PIPE_FORMAT_YUYV },
GL_TRUE }, /* at least one format must be supported */
{ { o(OES_compressed_ETC1_RGB8_texture) },
{ PIPE_FORMAT_ETC1_RGB8 } },
};
/* Required: vertex fetch support. */
static const struct st_extension_format_mapping vertex_mapping[] = {
{ { o(ARB_vertex_type_2_10_10_10_rev) },
{ PIPE_FORMAT_R10G10B10A2_UNORM,
PIPE_FORMAT_B10G10R10A2_UNORM,
PIPE_FORMAT_R10G10B10A2_SNORM,
PIPE_FORMAT_B10G10R10A2_SNORM,
PIPE_FORMAT_R10G10B10A2_USCALED,
PIPE_FORMAT_B10G10R10A2_USCALED,
PIPE_FORMAT_R10G10B10A2_SSCALED,
PIPE_FORMAT_B10G10R10A2_SSCALED } },
{ { o(ARB_vertex_type_10f_11f_11f_rev) },
{ PIPE_FORMAT_R11G11B10_FLOAT } },
};
static const struct st_extension_format_mapping tbo_rgb32[] = {
{ {o(ARB_texture_buffer_object_rgb32) },
{ PIPE_FORMAT_R32G32B32_FLOAT,
PIPE_FORMAT_R32G32B32_UINT,
PIPE_FORMAT_R32G32B32_SINT,
} },
};
/*
* Extensions that are supported by all Gallium drivers:
*/
ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
ctx->Extensions.ARB_fragment_program = GL_TRUE;
ctx->Extensions.ARB_fragment_shader = GL_TRUE;
ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
ctx->Extensions.ARB_internalformat_query = GL_TRUE;
ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
ctx->Extensions.ARB_vertex_program = GL_TRUE;
ctx->Extensions.ARB_vertex_shader = GL_TRUE;
ctx->Extensions.EXT_blend_color = GL_TRUE;
ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
ctx->Extensions.EXT_blend_minmax = GL_TRUE;
ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
ctx->Extensions.EXT_point_parameters = GL_TRUE;
ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
/* IMPORTANT:
* Don't enable EXT_separate_shader_objects. It disallows a certain
* optimization in the GLSL compiler and therefore is considered
* harmful.
*/
ctx->Extensions.EXT_separate_shader_objects = GL_FALSE;
ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
ctx->Extensions.MESA_pack_invert = GL_TRUE;
ctx->Extensions.NV_fog_distance = GL_TRUE;
ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
ctx->Extensions.NV_texture_rectangle = GL_TRUE;
ctx->Extensions.NV_vdpau_interop = GL_TRUE;
ctx->Extensions.OES_EGL_image = GL_TRUE;
ctx->Extensions.OES_EGL_image_external = GL_TRUE;
ctx->Extensions.OES_draw_texture = GL_TRUE;
/* Expose the extensions which directly correspond to gallium caps. */
for (i = 0; i < Elements(cap_mapping); i++) {
if (screen->get_param(screen, cap_mapping[i].cap)) {
extensions[cap_mapping[i].extension_offset] = GL_TRUE;
}
}
/* Expose the extensions which directly correspond to gallium formats. */
init_format_extensions(st, rendertarget_mapping,
Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
init_format_extensions(st, depthstencil_mapping,
Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
init_format_extensions(st, texture_mapping, Elements(texture_mapping),
PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
/* Figure out GLSL support. */
glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
ctx->Const.GLSLVersion = glsl_feature_level;
if (glsl_feature_level >= 330)
ctx->Const.GLSLVersion = 330;
_mesa_override_glsl_version(st->ctx);
if (st->options.force_glsl_version > 0 &&
st->options.force_glsl_version <= ctx->Const.GLSLVersion) {
ctx->Const.ForceGLSLVersion = st->options.force_glsl_version;
}
/* This extension needs full OpenGL 3.2, but we don't know if that's
* supported at this point. Only check the GLSL version. */
if (ctx->Const.GLSLVersion >= 150 &&
screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER)) {
ctx->Extensions.AMD_vertex_shader_layer = GL_TRUE;
}
if (ctx->Const.GLSLVersion >= 130) {
ctx->Const.NativeIntegers = GL_TRUE;
ctx->Const.MaxClipPlanes = 8;
/* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
ctx->Extensions.ARB_conservative_depth = GL_TRUE;
ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
ctx->Extensions.ARB_shading_language_420pack = GL_TRUE;
if (!st->options.disable_shader_bit_encoding) {
ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
}
} else {
/* Optional integer support for GLSL 1.2. */
if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
PIPE_SHADER_CAP_INTEGERS) &&
screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
PIPE_SHADER_CAP_INTEGERS)) {
ctx->Const.NativeIntegers = GL_TRUE;
}
}
/* Below are the cases which cannot be moved into tables easily. */
if (!ctx->Mesa_DXTn && !st->options.force_s3tc_enable) {
ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
ctx->Extensions.ANGLE_texture_compression_dxt = GL_FALSE;
}
if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
#if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
#endif
}
ctx->Extensions.NV_primitive_restart = GL_TRUE;
if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
}
/* ARB_color_buffer_float. */
if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
st->clamp_vert_color_in_shader = TRUE;
}
if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
st->clamp_frag_color_in_shader = TRUE;
}
/* For drivers which cannot do color clamping, it's better to just
* disable ARB_color_buffer_float in the core profile, because
* the clamping is deprecated there anyway. */
if (ctx->API == API_OPENGL_CORE &&
(st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
st->clamp_vert_color_in_shader = GL_FALSE;
st->clamp_frag_color_in_shader = GL_FALSE;
ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
}
}
if (screen->fence_finish) {
ctx->Extensions.ARB_sync = GL_TRUE;
}
/* Maximum sample count. */
for (i = 16; i > 0; --i) {
enum pipe_format pformat = st_choose_format(st, GL_RGBA,
GL_NONE, GL_NONE,
PIPE_TEXTURE_2D, i,
PIPE_BIND_RENDER_TARGET, FALSE);
if (pformat != PIPE_FORMAT_NONE) {
ctx->Const.MaxSamples = i;
ctx->Const.MaxColorTextureSamples = i;
break;
}
}
for (i = ctx->Const.MaxSamples; i > 0; --i) {
enum pipe_format pformat = st_choose_format(st, GL_DEPTH_STENCIL,
GL_NONE, GL_NONE,
PIPE_TEXTURE_2D, i,
PIPE_BIND_DEPTH_STENCIL, FALSE);
if (pformat != PIPE_FORMAT_NONE) {
ctx->Const.MaxDepthTextureSamples = i;
break;
}
}
for (i = ctx->Const.MaxSamples; i > 0; --i) {
enum pipe_format pformat = st_choose_format(st, GL_RGBA_INTEGER,
GL_NONE, GL_NONE,
PIPE_TEXTURE_2D, i,
PIPE_BIND_RENDER_TARGET, FALSE);
if (pformat != PIPE_FORMAT_NONE) {
ctx->Const.MaxIntegerSamples = i;
break;
}
}
if (ctx->Const.MaxSamples == 1) {
/* one sample doesn't really make sense */
ctx->Const.MaxSamples = 0;
}
else if (ctx->Const.MaxSamples >= 2) {
ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
}
if (ctx->Const.MaxDualSourceDrawBuffers > 0 &&
!st->options.disable_blend_func_extended)
ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
st->has_time_elapsed =
screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
if (st->has_time_elapsed ||
ctx->Extensions.ARB_timer_query) {
ctx->Extensions.EXT_timer_query = GL_TRUE;
}
if (ctx->Extensions.ARB_transform_feedback2 &&
ctx->Extensions.ARB_draw_instanced) {
ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
}
if (st->options.force_glsl_extensions_warn)
ctx->Const.ForceGLSLExtensionsWarn = 1;
if (st->options.disable_glsl_line_continuations)
ctx->Const.DisableGLSLLineContinuations = 1;
ctx->Const.MinMapBufferAlignment =
screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
ctx->Const.MaxTextureBufferSize =
_min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
(1u << 31) - 1);
ctx->Const.TextureBufferOffsetAlignment =
screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
if (ctx->Const.TextureBufferOffsetAlignment)
ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;
init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
}
if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
}
/* Unpacking a varying in the fragment shader costs 1 texture indirection.
* If the number of available texture indirections is very limited, then we
* prefer to disable varying packing rather than run the risk of varying
* packing preventing a shader from running.
*/
if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
/* We can't disable varying packing if transform feedback is available,
* because transform feedback code assumes a packed varying layout.
*/
if (!ctx->Extensions.EXT_transform_feedback)
ctx->Const.DisableVaryingPacking = GL_TRUE;
}
if (ctx->API == API_OPENGL_CORE) {
ctx->Const.MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
if (ctx->Const.MaxViewports >= 16) {
ctx->Const.ViewportBounds.Min = -16384.0;
ctx->Const.ViewportBounds.Max = 16384.0;
ctx->Extensions.ARB_viewport_array = GL_TRUE;
}
}
if (ctx->Const.MaxProgramTextureGatherComponents > 0)
ctx->Extensions.ARB_texture_gather = GL_TRUE;
}
/**
* Called via ctx->Driver.DrawPixels()
*/
static void
st_DrawPixels(struct gl_context *ctx, GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels)
{
void *driver_vp, *driver_fp;
struct st_context *st = st_context(ctx);
const GLfloat *color;
struct pipe_context *pipe = st->pipe;
GLboolean write_stencil = GL_FALSE, write_depth = GL_FALSE;
struct pipe_sampler_view *sv[2];
int num_sampler_view = 1;
enum pipe_format stencil_format = PIPE_FORMAT_NONE;
struct st_fp_variant *fpv;
if (format == GL_DEPTH_STENCIL)
write_stencil = write_depth = GL_TRUE;
else if (format == GL_STENCIL_INDEX)
write_stencil = GL_TRUE;
else if (format == GL_DEPTH_COMPONENT)
write_depth = GL_TRUE;
if (write_stencil) {
enum pipe_format tex_format;
/* can we write to stencil if not fallback */
if (!pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT))
goto stencil_fallback;
tex_format = st_choose_format(st->pipe->screen, base_format(format),
GL_NONE, GL_NONE,
PIPE_TEXTURE_2D,
0, PIPE_BIND_SAMPLER_VIEW);
if (tex_format == PIPE_FORMAT_Z24_UNORM_S8_USCALED)
stencil_format = PIPE_FORMAT_X24S8_USCALED;
else if (tex_format == PIPE_FORMAT_S8_USCALED_Z24_UNORM)
stencil_format = PIPE_FORMAT_S8X24_USCALED;
else
stencil_format = PIPE_FORMAT_S8_USCALED;
if (stencil_format == PIPE_FORMAT_NONE)
goto stencil_fallback;
}
/* Mesa state should be up to date by now */
assert(ctx->NewState == 0x0);
st_validate_state(st);
/*
* Get vertex/fragment shaders
*/
if (write_depth || write_stencil) {
fpv = get_depth_stencil_fp_variant(st, write_depth, write_stencil);
driver_fp = fpv->driver_shader;
driver_vp = make_passthrough_vertex_shader(st, GL_TRUE);
color = ctx->Current.RasterColor;
}
else {
fpv = get_color_fp_variant(st);
driver_fp = fpv->driver_shader;
driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
color = NULL;
if (st->pixel_xfer.pixelmap_enabled) {
sv[1] = st->pixel_xfer.pixelmap_sampler_view;
num_sampler_view++;
}
}
/* update fragment program constants */
st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT);
/* draw with textured quad */
{
struct pipe_resource *pt
= make_texture(st, width, height, format, type, unpack, pixels);
if (pt) {
sv[0] = st_create_texture_sampler_view(st->pipe, pt);
if (sv[0]) {
if (write_stencil) {
sv[1] = st_create_texture_sampler_view_format(st->pipe, pt,
stencil_format);
num_sampler_view++;
}
draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2],
width, height,
ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
sv,
num_sampler_view,
driver_vp,
driver_fp,
color, GL_FALSE, write_depth, write_stencil);
pipe_sampler_view_reference(&sv[0], NULL);
if (num_sampler_view > 1)
pipe_sampler_view_reference(&sv[1], NULL);
}
pipe_resource_reference(&pt, NULL);
}
}
return;
stencil_fallback:
draw_stencil_pixels(ctx, x, y, width, height, format, type,
unpack, pixels);
}
static void
st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy,
GLsizei width, GLsizei height,
GLint dstx, GLint dsty, GLenum type)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
struct st_renderbuffer *rbRead;
void *driver_vp, *driver_fp;
struct pipe_resource *pt;
struct pipe_sampler_view *sv[2];
int num_sampler_view = 1;
GLfloat *color;
enum pipe_format srcFormat, texFormat;
GLboolean invertTex = GL_FALSE;
GLint readX, readY, readW, readH;
GLuint sample_count;
struct gl_pixelstore_attrib pack = ctx->DefaultPacking;
struct st_fp_variant *fpv;
st_validate_state(st);
if (type == GL_STENCIL) {
/* can't use texturing to do stencil */
copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
return;
}
if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type))
return;
/*
* The subsequent code implements glCopyPixels by copying the source
* pixels into a temporary texture that's then applied to a textured quad.
* When we draw the textured quad, all the usual per-fragment operations
* are handled.
*/
/*
* Get vertex/fragment shaders
*/
if (type == GL_COLOR) {
rbRead = st_get_color_read_renderbuffer(ctx);
color = NULL;
fpv = get_color_fp_variant(st);
driver_fp = fpv->driver_shader;
driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
if (st->pixel_xfer.pixelmap_enabled) {
sv[1] = st->pixel_xfer.pixelmap_sampler_view;
num_sampler_view++;
}
}
else {
assert(type == GL_DEPTH);
rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer);
color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
fpv = get_depth_stencil_fp_variant(st, GL_TRUE, GL_FALSE);
driver_fp = fpv->driver_shader;
driver_vp = make_passthrough_vertex_shader(st, GL_TRUE);
}
/* update fragment program constants */
st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT);
if (rbRead->Base.Wrapped)
rbRead = st_renderbuffer(rbRead->Base.Wrapped);
sample_count = rbRead->texture->nr_samples;
/* I believe this would be legal, presumably would need to do a resolve
for color, and for depth/stencil spec says to just use one of the
depth/stencil samples per pixel? Need some transfer clarifications. */
assert(sample_count < 2);
srcFormat = rbRead->texture->format;
if (screen->is_format_supported(screen, srcFormat, st->internal_target,
sample_count,
PIPE_BIND_SAMPLER_VIEW)) {
texFormat = srcFormat;
}
else {
/* srcFormat can't be used as a texture format */
if (type == GL_DEPTH) {
texFormat = st_choose_format(screen, GL_DEPTH_COMPONENT,
GL_NONE, GL_NONE, st->internal_target,
sample_count, PIPE_BIND_DEPTH_STENCIL);
assert(texFormat != PIPE_FORMAT_NONE);
}
else {
/* default color format */
texFormat = st_choose_format(screen, GL_RGBA,
GL_NONE, GL_NONE, st->internal_target,
sample_count, PIPE_BIND_SAMPLER_VIEW);
assert(texFormat != PIPE_FORMAT_NONE);
}
}
/* Invert src region if needed */
if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
srcy = ctx->ReadBuffer->Height - srcy - height;
invertTex = !invertTex;
}
/* Clip the read region against the src buffer bounds.
* We'll still allocate a temporary buffer/texture for the original
* src region size but we'll only read the region which is on-screen.
* This may mean that we draw garbage pixels into the dest region, but
* that's expected.
*/
readX = srcx;
readY = srcy;
readW = width;
readH = height;
_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack);
readW = MAX2(0, readW);
readH = MAX2(0, readH);
/* alloc temporary texture */
pt = alloc_texture(st, width, height, texFormat);
if (!pt)
return;
sv[0] = st_create_texture_sampler_view(st->pipe, pt);
if (!sv[0]) {
pipe_resource_reference(&pt, NULL);
return;
}
/* Make temporary texture which is a copy of the src region.
*/
if (srcFormat == texFormat) {
struct pipe_box src_box;
u_box_2d(readX, readY, readW, readH, &src_box);
/* copy source framebuffer surface into mipmap/texture */
pipe->resource_copy_region(pipe,
pt, /* dest tex */
0, /* dest lvl */
pack.SkipPixels, pack.SkipRows, 0, /* dest pos */
rbRead->texture, /* src tex */
rbRead->rtt_level, /* src lvl */
&src_box);
}
else {
/* CPU-based fallback/conversion */
struct pipe_transfer *ptRead =
pipe_get_transfer(st->pipe, rbRead->texture,
rbRead->rtt_level,
rbRead->rtt_face + rbRead->rtt_slice,
PIPE_TRANSFER_READ,
readX, readY, readW, readH);
struct pipe_transfer *ptTex;
enum pipe_transfer_usage transfer_usage;
if (ST_DEBUG & DEBUG_FALLBACK)
debug_printf("%s: fallback processing\n", __FUNCTION__);
if (type == GL_DEPTH && util_format_is_depth_and_stencil(pt->format))
transfer_usage = PIPE_TRANSFER_READ_WRITE;
else
transfer_usage = PIPE_TRANSFER_WRITE;
ptTex = pipe_get_transfer(st->pipe, pt, 0, 0, transfer_usage,
0, 0, width, height);
/* copy image from ptRead surface to ptTex surface */
if (type == GL_COLOR) {
/* alternate path using get/put_tile() */
GLfloat *buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
enum pipe_format readFormat, drawFormat;
readFormat = util_format_linear(rbRead->texture->format);
drawFormat = util_format_linear(pt->format);
pipe_get_tile_rgba_format(pipe, ptRead, 0, 0, readW, readH,
readFormat, buf);
pipe_put_tile_rgba_format(pipe, ptTex, pack.SkipPixels, pack.SkipRows,
readW, readH, drawFormat, buf);
free(buf);
}
else {
/* GL_DEPTH */
GLuint *buf = (GLuint *) malloc(width * height * sizeof(GLuint));
pipe_get_tile_z(pipe, ptRead, 0, 0, readW, readH, buf);
pipe_put_tile_z(pipe, ptTex, pack.SkipPixels, pack.SkipRows,
readW, readH, buf);
free(buf);
}
pipe->transfer_destroy(pipe, ptRead);
pipe->transfer_destroy(pipe, ptTex);
}
/* OK, the texture 'pt' contains the src image/pixels. Now draw a
* textured quad with that texture.
*/
draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2],
width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
sv,
num_sampler_view,
driver_vp,
driver_fp,
color, invertTex, GL_FALSE, GL_FALSE);
pipe_resource_reference(&pt, NULL);
pipe_sampler_view_reference(&sv[0], NULL);
}
static void
st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLsizei width, GLsizei height,
GLint dstx, GLint dsty, GLenum type)
{
struct st_context *st = ctx->st;
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
struct st_renderbuffer *rbRead;
struct st_vertex_program *stvp;
struct st_fragment_program *stfp;
struct pipe_texture *pt;
GLfloat *color;
enum pipe_format srcFormat, texFormat;
pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
st_validate_state(st);
if (srcx < 0) {
width -= -srcx;
dstx += -srcx;
srcx = 0;
}
if (srcy < 0) {
height -= -srcy;
dsty += -srcy;
srcy = 0;
}
if (dstx < 0) {
width -= -dstx;
srcx += -dstx;
dstx = 0;
}
if (dsty < 0) {
height -= -dsty;
srcy += -dsty;
dsty = 0;
}
if (width < 0 || height < 0)
return;
if (type == GL_STENCIL) {
/* can't use texturing to do stencil */
copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
return;
}
if (type == GL_COLOR) {
rbRead = st_get_color_read_renderbuffer(ctx);
color = NULL;
stfp = combined_drawpix_fragment_program(ctx);
stvp = st_make_passthrough_vertex_shader(ctx->st, GL_FALSE);
}
else {
assert(type == GL_DEPTH);
rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer);
color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
stfp = make_fragment_shader_z(ctx->st);
stvp = st_make_passthrough_vertex_shader(ctx->st, GL_TRUE);
}
srcFormat = rbRead->texture->format;
if (screen->is_format_supported(screen, srcFormat, PIPE_TEXTURE_2D,
PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
texFormat = srcFormat;
}
else {
/* srcFormat can't be used as a texture format */
if (type == GL_DEPTH) {
texFormat = st_choose_format(pipe, GL_DEPTH_COMPONENT, PIPE_TEXTURE_2D,
PIPE_TEXTURE_USAGE_DEPTH_STENCIL);
assert(texFormat != PIPE_FORMAT_NONE); /* XXX no depth texture formats??? */
}
else {
/* default color format */
texFormat = st_choose_format(pipe, GL_RGBA, PIPE_TEXTURE_2D,
PIPE_TEXTURE_USAGE_SAMPLER);
assert(texFormat != PIPE_FORMAT_NONE);
}
}
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
srcy = ctx->DrawBuffer->Height - srcy - height;
if (srcy < 0) {
height -= -srcy;
srcy = 0;
}
if (height < 0)
return;
}
pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, texFormat, 0,
width, height, 1,
PIPE_TEXTURE_USAGE_SAMPLER);
if (!pt)
return;
if (srcFormat == texFormat) {
/* copy source framebuffer surface into mipmap/texture */
struct pipe_surface *psRead = screen->get_tex_surface(screen,
rbRead->texture, 0, 0, 0,
PIPE_BUFFER_USAGE_GPU_READ);
struct pipe_surface *psTex = screen->get_tex_surface(screen, pt, 0, 0, 0,
PIPE_BUFFER_USAGE_GPU_WRITE );
pipe->surface_copy(pipe,
psTex, /* dest */
0, 0, /* destx/y */
psRead,
srcx, srcy, width, height);
pipe_surface_reference(&psRead, NULL);
pipe_surface_reference(&psTex, NULL);
}
else {
/* CPU-based fallback/conversion */
struct pipe_transfer *ptRead =
st_cond_flush_get_tex_transfer(st, rbRead->texture, 0, 0, 0,
PIPE_TRANSFER_READ, srcx, srcy, width,
height);
struct pipe_transfer *ptTex;
enum pipe_transfer_usage transfer_usage;
if (type == GL_DEPTH && pf_is_depth_and_stencil(pt->format))
transfer_usage = PIPE_TRANSFER_READ_WRITE;
else
transfer_usage = PIPE_TRANSFER_WRITE;
ptTex = st_cond_flush_get_tex_transfer(st, pt, 0, 0, 0, transfer_usage,
0, 0, width, height);
if (type == GL_COLOR) {
/* alternate path using get/put_tile() */
GLfloat *buf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
pipe_get_tile_rgba(ptRead, 0, 0, width, height, buf);
pipe_put_tile_rgba(ptTex, 0, 0, width, height, buf);
_mesa_free(buf);
}
else {
/* GL_DEPTH */
GLuint *buf = (GLuint *) _mesa_malloc(width * height * sizeof(GLuint));
pipe_get_tile_z(ptRead, 0, 0, width, height, buf);
pipe_put_tile_z(ptTex, 0, 0, width, height, buf);
_mesa_free(buf);
}
screen->tex_transfer_destroy(ptRead);
screen->tex_transfer_destroy(ptTex);
}
/* draw textured quad */
draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2],
width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
pt, stvp, stfp, color, GL_TRUE);
pipe_texture_reference(&pt, NULL);
}
