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#include "evas_gl_private.h"
#include "evas_gl_3d_private.h"
#define E3D_MAX_TEXTURE_COUNT 8
#define E3D_MAX_VERTEX_ATTRIB_COUNT 8
struct _E3D_Renderer
{
Eina_List *programs;
GLuint fbo;
GLuint program;
E3D_Texture *textures[E3D_MAX_TEXTURE_COUNT];
Eina_Bool vertex_attrib_enable[E3D_MAX_VERTEX_ATTRIB_COUNT];
Eina_Bool depth_test_enable;
};
static inline GLenum
_gl_assembly_get(Evas_3D_Vertex_Assembly assembly)
{
switch (assembly)
{
case EVAS_3D_VERTEX_ASSEMBLY_POINTS:
return GL_POINTS;
case EVAS_3D_VERTEX_ASSEMBLY_LINES:
return GL_LINES;
case EVAS_3D_VERTEX_ASSEMBLY_LINE_STRIP:
return GL_LINE_STRIP;
case EVAS_3D_VERTEX_ASSEMBLY_LINE_LOOP:
return GL_LINE_LOOP;
case EVAS_3D_VERTEX_ASSEMBLY_TRIANGLES:
return GL_TRIANGLES;
case EVAS_3D_VERTEX_ASSEMBLY_TRIANGLE_STRIP:
return GL_TRIANGLE_STRIP;
case EVAS_3D_VERTEX_ASSEMBLY_TRIANGLE_FAN:
return GL_TRIANGLE_FAN;
default:
return GL_NONE;
}
}
static inline void
_renderer_vertex_attrib_array_enable(E3D_Renderer *renderer, int index)
{
if (renderer->vertex_attrib_enable[index])
return;
glEnableVertexAttribArray(index);
renderer->vertex_attrib_enable[index] = EINA_TRUE;
}
static inline void
_renderer_vertex_attrib_array_disable(E3D_Renderer *renderer, int index)
{
if (!renderer->vertex_attrib_enable[index])
return;
glDisableVertexAttribArray(index);
renderer->vertex_attrib_enable[index] = EINA_FALSE;
}
static inline void
_renderer_vertex_attrib_pointer_set(E3D_Renderer *renderer EINA_UNUSED, int index,
const Evas_3D_Vertex_Buffer *buffer)
{
glVertexAttribPointer(index, buffer->element_count, GL_FLOAT,
GL_FALSE, buffer->stride, buffer->data);
}
static inline void
_renderer_elements_draw(E3D_Renderer *renderer EINA_UNUSED, Evas_3D_Vertex_Assembly assembly,
int count, Evas_3D_Index_Format format, const void *indices)
{
GLenum mode = _gl_assembly_get(assembly);
if (format == EVAS_3D_INDEX_FORMAT_UNSIGNED_BYTE)
glDrawElements(mode, count, GL_UNSIGNED_BYTE, indices);
else if (format == EVAS_3D_INDEX_FORMAT_UNSIGNED_SHORT)
glDrawElements(mode, count, GL_UNSIGNED_SHORT, indices);
}
static inline void
_renderer_array_draw(E3D_Renderer *renderer EINA_UNUSED,
Evas_3D_Vertex_Assembly assembly, int count)
{
GLenum mode = _gl_assembly_get(assembly);
glDrawArrays(mode, 0, count);
}
static inline void
_renderer_program_use(E3D_Renderer *renderer ,E3D_Program *program)
{
GLuint prog = e3d_program_id_get(program);
if (renderer->program != prog)
{
glUseProgram(prog);
renderer->program = prog;
}
}
static inline void
_renderer_texture_bind(E3D_Renderer *renderer, E3D_Draw_Data *data)
{
int i;
for (i = 0; i < EVAS_3D_MATERIAL_ATTRIB_COUNT; i++)
{
if (data->materials[i].tex0)
{
if (renderer->textures[data->materials[i].sampler0] != data->materials[i].tex0)
{
glActiveTexture(GL_TEXTURE0 + data->materials[i].sampler0);
glBindTexture(GL_TEXTURE_2D, data->materials[i].tex0->tex);
e3d_texture_param_update(data->materials[i].tex0);
renderer->textures[data->materials[i].sampler0] = data->materials[i].tex0;
}
}
if (data->materials[i].tex1)
{
if (renderer->textures[data->materials[i].sampler1] != data->materials[i].tex1)
{
glActiveTexture(GL_TEXTURE0 + data->materials[i].sampler1);
glBindTexture(GL_TEXTURE_2D, data->materials[i].tex1->tex);
e3d_texture_param_update(data->materials[i].tex1);
renderer->textures[data->materials[i].sampler1] = data->materials[i].tex1;
}
}
}
}
static inline void
_renderer_depth_test_enable(E3D_Renderer *renderer, Eina_Bool enable)
{
if (renderer->depth_test_enable != enable)
{
if (enable)
{
glEnable(GL_DEPTH_TEST);
/* Use default depth func. */
}
else
{
glDisable(GL_DEPTH_TEST);
}
renderer->depth_test_enable = enable;
}
}
E3D_Renderer *
e3d_renderer_new(void)
{
E3D_Renderer *renderer = NULL;
renderer = (E3D_Renderer *)calloc(1, sizeof(E3D_Renderer));
if (renderer == NULL)
{
ERR("Failed to allocate memory.");
return NULL;
}
return renderer;
}
void
e3d_renderer_free(E3D_Renderer *renderer)
{
Eina_List *l;
E3D_Program *p;
EINA_LIST_FOREACH(renderer->programs, l, p)
{
e3d_program_free(p);
}
eina_list_free(renderer->programs);
}
void
e3d_renderer_target_set(E3D_Renderer *renderer, E3D_Drawable *target)
{
if (renderer->fbo == target->fbo)
return;
glBindFramebuffer(GL_FRAMEBUFFER, target->fbo);
glViewport(0, 0, target->w, target->h);
renderer->fbo = target->fbo;
}
void
e3d_renderer_clear(E3D_Renderer *renderer EINA_UNUSED, const Evas_Color *color)
{
glClearColor(color->r, color->g, color->b, color->a);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void
e3d_renderer_draw(E3D_Renderer *renderer, E3D_Draw_Data *data)
{
Eina_List *l;
E3D_Program *program = NULL, *p;
int i, index = 0;
_renderer_depth_test_enable(renderer, EINA_TRUE);
EINA_LIST_FOREACH(renderer->programs, l, p)
{
if (e3d_program_shade_mode_get(p) == data->mode &&
e3d_program_shader_flags_get(p) == data->flags)
{
program = p;
break;
}
}
if (program == NULL)
{
program = e3d_program_new(data->mode, data->flags);
if (program == NULL)
{
ERR("Failed to create shader program.");
return;
}
renderer->programs = eina_list_append(renderer->programs, program);
}
_renderer_program_use(renderer, program);
e3d_program_uniform_upload(program, data);
_renderer_texture_bind(renderer, data);
/* Set up vertex attrib pointers. */
index = 0;
for (i = 0; i < EVAS_3D_VERTEX_ATTRIB_COUNT; i++)
{
const Evas_3D_Vertex_Buffer *buffer;
buffer = &data->vertices[i].vertex0;
if (buffer->data != NULL)
{
_renderer_vertex_attrib_array_enable(renderer, index);
_renderer_vertex_attrib_pointer_set(renderer, index, buffer);
index++;
}
buffer = &data->vertices[i].vertex1;
if (buffer->data != NULL)
{
_renderer_vertex_attrib_array_enable(renderer, index);
_renderer_vertex_attrib_pointer_set(renderer, index, buffer);
index++;
}
}
while (index < E3D_MAX_VERTEX_ATTRIB_COUNT)
_renderer_vertex_attrib_array_disable(renderer, index++);
if (data->indices)
{
_renderer_elements_draw(renderer, data->assembly, data->index_count,
data->index_format, data->indices);
}
else
{
_renderer_array_draw(renderer, data->assembly, data->vertex_count);
}
}
void
e3d_renderer_flush(E3D_Renderer *renderer EINA_UNUSED)
{
glFlush();
}
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